/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 06:06:51,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 06:06:51,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 06:06:51,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 06:06:51,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 06:06:51,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 06:06:51,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 06:06:51,340 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 06:06:51,353 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 06:06:51,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 06:06:51,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 06:06:51,355 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 06:06:51,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 06:06:51,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 06:06:51,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 06:06:51,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 06:06:51,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 06:06:51,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 06:06:51,356 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 06:06:51,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 06:06:51,357 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 06:06:51,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 06:06:51,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 06:06:51,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 06:06:51,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 06:06:51,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 06:06:51,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 06:06:51,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 06:06:51,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 06:06:51,359 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 06:06:51,359 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 06:06:51,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 06:06:51,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 06:06:51,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 06:06:51,597 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 06:06:51,598 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 06:06:51,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i [2021-05-06 06:06:51,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ccd706c0/7550a9db21714985bcc374c2d689e813/FLAGdea3e0b99 [2021-05-06 06:06:51,974 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 06:06:51,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i [2021-05-06 06:06:51,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ccd706c0/7550a9db21714985bcc374c2d689e813/FLAGdea3e0b99 [2021-05-06 06:06:51,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ccd706c0/7550a9db21714985bcc374c2d689e813 [2021-05-06 06:06:52,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 06:06:52,003 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 06:06:52,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 06:06:52,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 06:06:52,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 06:06:52,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:06:52" (1/1) ... [2021-05-06 06:06:52,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bcb5fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:06:52, skipping insertion in model container [2021-05-06 06:06:52,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:06:52" (1/1) ... [2021-05-06 06:06:52,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 06:06:52,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 06:06:52,143 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i[891,904] [2021-05-06 06:06:52,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:06:52,161 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 06:06:52,198 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i[891,904] [2021-05-06 06:06:52,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:06:52,220 INFO L208 MainTranslator]: Completed translation [2021-05-06 06:06:52,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:06:52 WrapperNode [2021-05-06 06:06:52,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 06:06:52,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 06:06:52,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 06:06:52,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 06:06:52,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:06:52" (1/1) ... [2021-05-06 06:06:52,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:06:52" (1/1) ... [2021-05-06 06:06:52,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:06:52" (1/1) ... [2021-05-06 06:06:52,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:06:52" (1/1) ... [2021-05-06 06:06:52,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:06:52" (1/1) ... [2021-05-06 06:06:52,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:06:52" (1/1) ... [2021-05-06 06:06:52,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:06:52" (1/1) ... [2021-05-06 06:06:52,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 06:06:52,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 06:06:52,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 06:06:52,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 06:06:52,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:06:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 06:06:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 06:06:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 06:06:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 06:06:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 06:06:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 06:06:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 06:06:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 06:06:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 06:06:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 06:06:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 06:06:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 06:06:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 06:06:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 06:06:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 06:06:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 06:06:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 06:06:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 06:06:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 06:06:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 06:06:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 06:06:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 06:06:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 06:06:52,482 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 06:06:52,486 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 06:06:52,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:06:52 BoogieIcfgContainer [2021-05-06 06:06:52,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 06:06:52,488 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 06:06:52,488 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 06:06:52,489 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 06:06:52,490 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:06:52" (1/1) ... [2021-05-06 06:06:52,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:06:52 BasicIcfg [2021-05-06 06:06:52,500 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 06:06:52,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 06:06:52,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 06:06:52,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 06:06:52,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 06:06:52" (1/4) ... [2021-05-06 06:06:52,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51119b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:06:52, skipping insertion in model container [2021-05-06 06:06:52,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:06:52" (2/4) ... [2021-05-06 06:06:52,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51119b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:06:52, skipping insertion in model container [2021-05-06 06:06:52,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:06:52" (3/4) ... [2021-05-06 06:06:52,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51119b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:06:52, skipping insertion in model container [2021-05-06 06:06:52,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:06:52" (4/4) ... [2021-05-06 06:06:52,504 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.iJordan [2021-05-06 06:06:52,508 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 06:06:52,510 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 06:06:52,533 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 06:06:52,545 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 06:06:52,545 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 06:06:52,546 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 06:06:52,546 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 06:06:52,546 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 06:06:52,546 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 06:06:52,546 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 06:06:52,546 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 06:06:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 06:06:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 06:06:52,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:06:52,560 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:06:52,561 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:06:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:06:52,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1527693123, now seen corresponding path program 1 times [2021-05-06 06:06:52,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:06:52,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346970057] [2021-05-06 06:06:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:06:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:06:52,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:06:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:06:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:06:52,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:06:52,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346970057] [2021-05-06 06:06:52,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346970057] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:06:52,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:06:52,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 06:06:52,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478746550] [2021-05-06 06:06:52,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 06:06:52,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:06:52,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 06:06:52,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:06:52,770 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:06:52,805 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-05-06 06:06:52,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 06:06:52,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 06:06:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:06:52,811 INFO L225 Difference]: With dead ends: 21 [2021-05-06 06:06:52,811 INFO L226 Difference]: Without dead ends: 14 [2021-05-06 06:06:52,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:06:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-06 06:06:52,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-06 06:06:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-06 06:06:52,831 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-06 06:06:52,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:06:52,832 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-06 06:06:52,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-06 06:06:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 06:06:52,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:06:52,833 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:06:52,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 06:06:52,833 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:06:52,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:06:52,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1526769602, now seen corresponding path program 1 times [2021-05-06 06:06:52,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:06:52,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687313116] [2021-05-06 06:06:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:06:52,861 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:06:52,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361816269] [2021-05-06 06:06:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:06:52,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 06:06:52,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:06:52,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:06:53,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:06:53,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687313116] [2021-05-06 06:06:53,004 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:06:53,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361816269] [2021-05-06 06:06:53,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361816269] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:06:53,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:06:53,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 06:06:53,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985892317] [2021-05-06 06:06:53,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 06:06:53,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:06:53,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 06:06:53,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:06:53,006 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:53,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:06:53,024 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-05-06 06:06:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 06:06:53,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 06:06:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:06:53,025 INFO L225 Difference]: With dead ends: 16 [2021-05-06 06:06:53,025 INFO L226 Difference]: Without dead ends: 16 [2021-05-06 06:06:53,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:06:53,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-06 06:06:53,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-06 06:06:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-06 06:06:53,028 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-06 06:06:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:06:53,028 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-06 06:06:53,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-06 06:06:53,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 06:06:53,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:06:53,029 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:06:53,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 06:06:53,234 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:06:53,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:06:53,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1730344036, now seen corresponding path program 1 times [2021-05-06 06:06:53,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:06:53,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379236297] [2021-05-06 06:06:53,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:06:53,249 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:06:53,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890417458] [2021-05-06 06:06:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:06:53,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 06:06:53,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:06:53,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:53,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:53,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:53,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:53,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:06:53,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:06:53,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379236297] [2021-05-06 06:06:53,452 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:06:53,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890417458] [2021-05-06 06:06:53,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890417458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:06:53,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:06:53,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 06:06:53,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089061499] [2021-05-06 06:06:53,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 06:06:53,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:06:53,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 06:06:53,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 06:06:53,453 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:06:53,512 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-06 06:06:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 06:06:53,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 06:06:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:06:53,513 INFO L225 Difference]: With dead ends: 20 [2021-05-06 06:06:53,513 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 06:06:53,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 06:06:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 06:06:53,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 06:06:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-06 06:06:53,515 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-06 06:06:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:06:53,515 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-06 06:06:53,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:53,515 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-06 06:06:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 06:06:53,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:06:53,516 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:06:53,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:53,721 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:06:53,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:06:53,721 INFO L82 PathProgramCache]: Analyzing trace with hash 203120506, now seen corresponding path program 2 times [2021-05-06 06:06:53,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:06:53,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153933822] [2021-05-06 06:06:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:06:53,730 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:06:53,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420282439] [2021-05-06 06:06:53,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:53,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:06:53,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:06:53,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 06:06:53,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:06:53,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:53,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:53,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:53,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:53,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:06:53,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:06:53,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153933822] [2021-05-06 06:06:53,918 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:06:53,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420282439] [2021-05-06 06:06:53,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420282439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:06:53,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:06:53,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 06:06:53,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763069964] [2021-05-06 06:06:53,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 06:06:53,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:06:53,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 06:06:53,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 06:06:53,921 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:54,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:06:54,008 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-06 06:06:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 06:06:54,008 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-06 06:06:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:06:54,010 INFO L225 Difference]: With dead ends: 22 [2021-05-06 06:06:54,010 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 06:06:54,011 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 06:06:54,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 06:06:54,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 06:06:54,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-06 06:06:54,017 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-06 06:06:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:06:54,018 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-06 06:06:54,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-06 06:06:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 06:06:54,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:06:54,019 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:06:54,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:54,233 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:06:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:06:54,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1458293800, now seen corresponding path program 3 times [2021-05-06 06:06:54,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:06:54,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574381045] [2021-05-06 06:06:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:06:54,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:06:54,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44254316] [2021-05-06 06:06:54,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:54,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 06:06:54,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:06:54,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 06:06:54,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:06:54,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:54,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:54,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:54,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:54,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:06:54,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:06:54,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574381045] [2021-05-06 06:06:54,430 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:06:54,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44254316] [2021-05-06 06:06:54,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44254316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:06:54,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:06:54,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 06:06:54,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198232969] [2021-05-06 06:06:54,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 06:06:54,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:06:54,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 06:06:54,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 06:06:54,432 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:54,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:06:54,518 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-06 06:06:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 06:06:54,519 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 06:06:54,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:06:54,519 INFO L225 Difference]: With dead ends: 24 [2021-05-06 06:06:54,520 INFO L226 Difference]: Without dead ends: 21 [2021-05-06 06:06:54,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-06 06:06:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-06 06:06:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-06 06:06:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-06 06:06:54,525 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-05-06 06:06:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:06:54,526 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-06 06:06:54,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-06 06:06:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 06:06:54,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:06:54,527 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:06:54,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:54,735 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:06:54,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:06:54,736 INFO L82 PathProgramCache]: Analyzing trace with hash -349607754, now seen corresponding path program 4 times [2021-05-06 06:06:54,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:06:54,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932463060] [2021-05-06 06:06:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:06:54,744 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:06:54,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570667792] [2021-05-06 06:06:54,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:54,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:06:54,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:06:54,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 06:06:54,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:06:54,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:54,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:54,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:54,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:54,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:06:55,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:06:55,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932463060] [2021-05-06 06:06:55,001 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:06:55,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570667792] [2021-05-06 06:06:55,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570667792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:06:55,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:06:55,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 06:06:55,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711913349] [2021-05-06 06:06:55,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 06:06:55,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:06:55,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 06:06:55,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-06 06:06:55,002 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:55,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:06:55,128 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-06 06:06:55,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 06:06:55,128 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-06 06:06:55,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:06:55,129 INFO L225 Difference]: With dead ends: 26 [2021-05-06 06:06:55,129 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 06:06:55,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-05-06 06:06:55,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 06:06:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 06:06:55,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-06 06:06:55,131 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-05-06 06:06:55,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:06:55,131 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-06 06:06:55,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:55,131 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-06 06:06:55,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 06:06:55,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:06:55,132 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:06:55,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:55,345 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:06:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:06:55,345 INFO L82 PathProgramCache]: Analyzing trace with hash -54206956, now seen corresponding path program 5 times [2021-05-06 06:06:55,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:06:55,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793531480] [2021-05-06 06:06:55,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:06:55,353 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:06:55,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583130562] [2021-05-06 06:06:55,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:55,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 06:06:55,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:06:55,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 06:06:55,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:06:55,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:55,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:55,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:55,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:55,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:06:55,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:06:55,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793531480] [2021-05-06 06:06:55,582 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:06:55,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583130562] [2021-05-06 06:06:55,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583130562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:06:55,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:06:55,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 06:06:55,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602018796] [2021-05-06 06:06:55,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 06:06:55,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:06:55,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 06:06:55,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-05-06 06:06:55,583 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:06:55,718 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-06 06:06:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 06:06:55,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-06 06:06:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:06:55,718 INFO L225 Difference]: With dead ends: 28 [2021-05-06 06:06:55,719 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 06:06:55,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-05-06 06:06:55,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 06:06:55,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 06:06:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-06 06:06:55,721 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-05-06 06:06:55,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:06:55,721 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-06 06:06:55,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:55,721 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-06 06:06:55,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 06:06:55,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:06:55,721 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:06:55,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:55,933 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:06:55,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:06:55,933 INFO L82 PathProgramCache]: Analyzing trace with hash 358118386, now seen corresponding path program 6 times [2021-05-06 06:06:55,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:06:55,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758668027] [2021-05-06 06:06:55,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:06:55,941 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:06:55,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581426257] [2021-05-06 06:06:55,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:55,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 06:06:55,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:06:55,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 06:06:55,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:06:56,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:56,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:56,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:56,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:56,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:06:56,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:06:56,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758668027] [2021-05-06 06:06:56,235 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:06:56,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581426257] [2021-05-06 06:06:56,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581426257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:06:56,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:06:56,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 06:06:56,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22189533] [2021-05-06 06:06:56,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 06:06:56,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:06:56,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 06:06:56,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-06 06:06:56,236 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:56,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:06:56,364 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-06 06:06:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 06:06:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-06 06:06:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:06:56,365 INFO L225 Difference]: With dead ends: 30 [2021-05-06 06:06:56,365 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 06:06:56,365 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-05-06 06:06:56,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 06:06:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 06:06:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:56,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-06 06:06:56,367 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-05-06 06:06:56,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:06:56,367 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-06 06:06:56,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-06 06:06:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 06:06:56,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:06:56,368 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:06:56,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:56,589 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:06:56,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:06:56,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1465780816, now seen corresponding path program 7 times [2021-05-06 06:06:56,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:06:56,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787291111] [2021-05-06 06:06:56,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:06:56,597 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:06:56,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485050665] [2021-05-06 06:06:56,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:06:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 06:06:56,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:06:56,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:56,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:56,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:56,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:56,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:06:56,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:06:56,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787291111] [2021-05-06 06:06:56,908 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:06:56,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485050665] [2021-05-06 06:06:56,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485050665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:06:56,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:06:56,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 06:06:56,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964999799] [2021-05-06 06:06:56,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 06:06:56,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:06:56,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 06:06:56,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-05-06 06:06:56,909 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:57,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:06:57,079 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-06 06:06:57,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 06:06:57,079 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-06 06:06:57,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:06:57,080 INFO L225 Difference]: With dead ends: 32 [2021-05-06 06:06:57,080 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 06:06:57,080 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-05-06 06:06:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 06:06:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 06:06:57,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-06 06:06:57,082 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-05-06 06:06:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:06:57,082 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-06 06:06:57,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:57,082 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-06 06:06:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 06:06:57,083 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:06:57,083 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:06:57,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 06:06:57,289 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:06:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:06:57,290 INFO L82 PathProgramCache]: Analyzing trace with hash 777486638, now seen corresponding path program 8 times [2021-05-06 06:06:57,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:06:57,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589230886] [2021-05-06 06:06:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:06:57,297 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:06:57,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629952171] [2021-05-06 06:06:57,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:57,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:06:57,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:06:57,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 06:06:57,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:06:57,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:57,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:57,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:57,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:57,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:06:57,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:06:57,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589230886] [2021-05-06 06:06:57,630 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:06:57,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629952171] [2021-05-06 06:06:57,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629952171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:06:57,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:06:57,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 06:06:57,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574038215] [2021-05-06 06:06:57,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 06:06:57,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:06:57,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 06:06:57,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-05-06 06:06:57,631 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:06:57,820 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-06 06:06:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 06:06:57,820 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-06 06:06:57,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:06:57,821 INFO L225 Difference]: With dead ends: 34 [2021-05-06 06:06:57,821 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 06:06:57,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2021-05-06 06:06:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 06:06:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 06:06:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-06 06:06:57,823 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-05-06 06:06:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:06:57,823 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-06 06:06:57,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-06 06:06:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 06:06:57,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:06:57,824 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:06:58,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 06:06:58,024 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:06:58,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:06:58,025 INFO L82 PathProgramCache]: Analyzing trace with hash 751745164, now seen corresponding path program 9 times [2021-05-06 06:06:58,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:06:58,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442363254] [2021-05-06 06:06:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:06:58,044 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:06:58,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584809818] [2021-05-06 06:06:58,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:58,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 06:06:58,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:06:58,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 06:06:58,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:06:58,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:58,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:58,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:58,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:58,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:06:58,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:06:58,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442363254] [2021-05-06 06:06:58,443 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:06:58,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584809818] [2021-05-06 06:06:58,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584809818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:06:58,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:06:58,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-06 06:06:58,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744883062] [2021-05-06 06:06:58,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 06:06:58,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:06:58,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 06:06:58,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-05-06 06:06:58,444 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:58,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:06:58,672 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-06 06:06:58,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 06:06:58,673 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-06 06:06:58,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:06:58,673 INFO L225 Difference]: With dead ends: 36 [2021-05-06 06:06:58,673 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 06:06:58,674 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2021-05-06 06:06:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 06:06:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 06:06:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-06 06:06:58,676 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-05-06 06:06:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:06:58,676 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-06 06:06:58,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-06 06:06:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 06:06:58,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:06:58,676 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:06:58,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:58,881 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:06:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:06:58,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1783992426, now seen corresponding path program 10 times [2021-05-06 06:06:58,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:06:58,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299747436] [2021-05-06 06:06:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:06:58,889 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:06:58,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673417902] [2021-05-06 06:06:58,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:58,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:06:58,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:06:58,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-06 06:06:58,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:06:59,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:59,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:59,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:59,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:59,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:06:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:06:59,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:06:59,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299747436] [2021-05-06 06:06:59,323 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:06:59,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673417902] [2021-05-06 06:06:59,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673417902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:06:59,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:06:59,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-06 06:06:59,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854122393] [2021-05-06 06:06:59,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 06:06:59,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:06:59,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 06:06:59,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2021-05-06 06:06:59,324 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:59,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:06:59,612 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-06 06:06:59,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 06:06:59,612 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-06 06:06:59,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:06:59,613 INFO L225 Difference]: With dead ends: 38 [2021-05-06 06:06:59,613 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 06:06:59,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2021-05-06 06:06:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 06:06:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 06:06:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-06 06:06:59,615 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-05-06 06:06:59,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:06:59,615 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-06 06:06:59,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:06:59,615 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-06 06:06:59,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 06:06:59,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:06:59,616 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:06:59,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 06:06:59,829 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:06:59,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:06:59,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1636165832, now seen corresponding path program 11 times [2021-05-06 06:06:59,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:06:59,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845967511] [2021-05-06 06:06:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:06:59,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:06:59,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745229829] [2021-05-06 06:06:59,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:06:59,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 06:06:59,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:06:59,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 06:06:59,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:00,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:00,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:00,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:00,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:00,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:00,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:00,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845967511] [2021-05-06 06:07:00,338 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:00,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745229829] [2021-05-06 06:07:00,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745229829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:00,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:00,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-06 06:07:00,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185991442] [2021-05-06 06:07:00,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 06:07:00,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:00,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 06:07:00,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-05-06 06:07:00,340 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:00,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:00,614 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-06 06:07:00,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 06:07:00,614 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-06 06:07:00,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:00,615 INFO L225 Difference]: With dead ends: 40 [2021-05-06 06:07:00,615 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 06:07:00,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2021-05-06 06:07:00,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 06:07:00,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 06:07:00,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:00,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-06 06:07:00,617 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-05-06 06:07:00,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:00,617 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-06 06:07:00,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:00,617 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-06 06:07:00,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 06:07:00,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:00,618 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:00,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:00,833 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:00,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1308729766, now seen corresponding path program 12 times [2021-05-06 06:07:00,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:00,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206059593] [2021-05-06 06:07:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:00,845 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:00,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756582781] [2021-05-06 06:07:00,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:00,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 06:07:00,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:00,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 06:07:00,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:01,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:01,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:01,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:01,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:01,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:01,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:01,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206059593] [2021-05-06 06:07:01,428 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:01,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756582781] [2021-05-06 06:07:01,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756582781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:01,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:01,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-06 06:07:01,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148866647] [2021-05-06 06:07:01,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 06:07:01,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:01,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 06:07:01,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-05-06 06:07:01,430 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:01,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:01,827 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-06 06:07:01,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 06:07:01,828 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-06 06:07:01,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:01,828 INFO L225 Difference]: With dead ends: 42 [2021-05-06 06:07:01,828 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 06:07:01,829 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=66, Invalid=926, Unknown=0, NotChecked=0, Total=992 [2021-05-06 06:07:01,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 06:07:01,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 06:07:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-06 06:07:01,835 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-06 06:07:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:01,835 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-06 06:07:01,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:01,837 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-06 06:07:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 06:07:01,838 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:01,838 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:02,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 06:07:02,054 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:02,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:02,054 INFO L82 PathProgramCache]: Analyzing trace with hash 175282948, now seen corresponding path program 13 times [2021-05-06 06:07:02,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:02,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385774458] [2021-05-06 06:07:02,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:02,066 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:02,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033065859] [2021-05-06 06:07:02,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:02,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-06 06:07:02,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:02,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:02,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:02,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:02,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:02,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:02,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:02,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385774458] [2021-05-06 06:07:02,646 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:02,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033065859] [2021-05-06 06:07:02,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033065859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:02,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:02,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-05-06 06:07:02,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971834055] [2021-05-06 06:07:02,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 06:07:02,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:02,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 06:07:02,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2021-05-06 06:07:02,648 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:03,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:03,022 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-06 06:07:03,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 06:07:03,022 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-06 06:07:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:03,023 INFO L225 Difference]: With dead ends: 44 [2021-05-06 06:07:03,023 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 06:07:03,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 487.4ms TimeCoverageRelationStatistics Valid=70, Invalid=1052, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 06:07:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 06:07:03,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 06:07:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:03,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-06 06:07:03,029 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-05-06 06:07:03,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:03,030 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-06 06:07:03,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:03,030 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-06 06:07:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 06:07:03,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:03,030 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:03,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:03,231 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:03,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:03,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1854584034, now seen corresponding path program 14 times [2021-05-06 06:07:03,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:03,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396678210] [2021-05-06 06:07:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:03,237 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:03,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600467145] [2021-05-06 06:07:03,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:03,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:07:03,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:03,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 06:07:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:03,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:03,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:03,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:03,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:03,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:03,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:03,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396678210] [2021-05-06 06:07:03,855 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:03,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600467145] [2021-05-06 06:07:03,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600467145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:03,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:03,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-05-06 06:07:03,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389771706] [2021-05-06 06:07:03,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 06:07:03,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:03,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 06:07:03,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 06:07:03,856 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:04,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:04,253 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-06 06:07:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 06:07:04,253 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-06 06:07:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:04,253 INFO L225 Difference]: With dead ends: 46 [2021-05-06 06:07:04,254 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 06:07:04,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 520.1ms TimeCoverageRelationStatistics Valid=74, Invalid=1186, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 06:07:04,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 06:07:04,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 06:07:04,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-06 06:07:04,255 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-05-06 06:07:04,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:04,256 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-06 06:07:04,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-06 06:07:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 06:07:04,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:04,256 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:04,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 06:07:04,472 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:04,472 INFO L82 PathProgramCache]: Analyzing trace with hash 755224384, now seen corresponding path program 15 times [2021-05-06 06:07:04,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:04,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420097349] [2021-05-06 06:07:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:04,477 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:04,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500862108] [2021-05-06 06:07:04,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:04,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 06:07:04,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:04,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-06 06:07:04,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:05,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:05,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:05,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:05,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:05,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:05,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:05,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420097349] [2021-05-06 06:07:05,196 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:05,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500862108] [2021-05-06 06:07:05,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500862108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:05,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:05,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-06 06:07:05,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559277351] [2021-05-06 06:07:05,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-06 06:07:05,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:05,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-06 06:07:05,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 06:07:05,197 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:05,632 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-06 06:07:05,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 06:07:05,633 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-06 06:07:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:05,633 INFO L225 Difference]: With dead ends: 48 [2021-05-06 06:07:05,633 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 06:07:05,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 600.4ms TimeCoverageRelationStatistics Valid=78, Invalid=1328, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 06:07:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 06:07:05,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 06:07:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 06:07:05,635 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-05-06 06:07:05,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:05,635 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 06:07:05,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:05,636 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 06:07:05,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 06:07:05,636 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:05,636 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:05,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:05,845 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:05,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:05,846 INFO L82 PathProgramCache]: Analyzing trace with hash 832555550, now seen corresponding path program 16 times [2021-05-06 06:07:05,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:05,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810329953] [2021-05-06 06:07:05,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:05,857 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:05,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45950761] [2021-05-06 06:07:05,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:05,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:07:05,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:05,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 06:07:05,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:06,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:06,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:06,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:06,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:06,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:06,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:06,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810329953] [2021-05-06 06:07:06,565 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:06,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45950761] [2021-05-06 06:07:06,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45950761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:06,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:06,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-05-06 06:07:06,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428336145] [2021-05-06 06:07:06,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-06 06:07:06,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:06,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-06 06:07:06,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 06:07:06,566 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:07,026 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-06 06:07:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 06:07:07,026 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-06 06:07:07,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:07,027 INFO L225 Difference]: With dead ends: 50 [2021-05-06 06:07:07,027 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 06:07:07,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 607.5ms TimeCoverageRelationStatistics Valid=82, Invalid=1478, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 06:07:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 06:07:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 06:07:07,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-06 06:07:07,029 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-05-06 06:07:07,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:07,029 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-06 06:07:07,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:07,029 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-06 06:07:07,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 06:07:07,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:07,029 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:07,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-06 06:07:07,245 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2133362044, now seen corresponding path program 17 times [2021-05-06 06:07:07,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:07,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008838984] [2021-05-06 06:07:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:07,251 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:07,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228553512] [2021-05-06 06:07:07,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:07,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-06 06:07:07,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:07,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-06 06:07:07,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:07,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:07,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:07,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:07,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:07,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:08,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:08,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008838984] [2021-05-06 06:07:08,028 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:08,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228553512] [2021-05-06 06:07:08,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228553512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:08,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:08,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-05-06 06:07:08,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428320882] [2021-05-06 06:07:08,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-06 06:07:08,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:08,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-06 06:07:08,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 06:07:08,030 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:08,544 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-06 06:07:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 06:07:08,544 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-06 06:07:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:08,544 INFO L225 Difference]: With dead ends: 52 [2021-05-06 06:07:08,544 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 06:07:08,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 675.0ms TimeCoverageRelationStatistics Valid=86, Invalid=1636, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 06:07:08,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 06:07:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 06:07:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-06 06:07:08,546 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-05-06 06:07:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:08,547 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-06 06:07:08,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:08,547 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-06 06:07:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 06:07:08,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:08,547 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:08,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 06:07:08,764 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:08,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:08,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1922047654, now seen corresponding path program 18 times [2021-05-06 06:07:08,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:08,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96614024] [2021-05-06 06:07:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:08,772 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:08,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187853877] [2021-05-06 06:07:08,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:08,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-06 06:07:08,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:08,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-06 06:07:08,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:09,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:09,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:09,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:09,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:09,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:09,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:09,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96614024] [2021-05-06 06:07:09,745 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:09,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187853877] [2021-05-06 06:07:09,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187853877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:09,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:09,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-05-06 06:07:09,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958575841] [2021-05-06 06:07:09,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-06 06:07:09,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:09,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-06 06:07:09,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 06:07:09,746 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:10,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:10,344 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-06 06:07:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 06:07:10,350 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-06 06:07:10,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:10,350 INFO L225 Difference]: With dead ends: 54 [2021-05-06 06:07:10,350 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 06:07:10,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 847.4ms TimeCoverageRelationStatistics Valid=90, Invalid=1802, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 06:07:10,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 06:07:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-06 06:07:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:10,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-06 06:07:10,355 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-05-06 06:07:10,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:10,355 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-06 06:07:10,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:10,355 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-06 06:07:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 06:07:10,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:10,355 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:10,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 06:07:10,561 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:10,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:10,561 INFO L82 PathProgramCache]: Analyzing trace with hash 659537336, now seen corresponding path program 19 times [2021-05-06 06:07:10,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:10,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628779487] [2021-05-06 06:07:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:10,573 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:10,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464211043] [2021-05-06 06:07:10,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:10,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 06:07:10,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:11,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:11,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:11,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:11,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:11,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:11,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:11,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628779487] [2021-05-06 06:07:11,510 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:11,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464211043] [2021-05-06 06:07:11,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464211043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:11,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:11,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-05-06 06:07:11,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745472992] [2021-05-06 06:07:11,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-06 06:07:11,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:11,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-06 06:07:11,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 06:07:11,511 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:12,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:12,124 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-06 06:07:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 06:07:12,124 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-06 06:07:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:12,125 INFO L225 Difference]: With dead ends: 56 [2021-05-06 06:07:12,125 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 06:07:12,125 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 841.5ms TimeCoverageRelationStatistics Valid=94, Invalid=1976, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 06:07:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 06:07:12,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-06 06:07:12,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-06 06:07:12,127 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-05-06 06:07:12,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:12,127 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-06 06:07:12,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:12,127 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-06 06:07:12,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 06:07:12,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:12,127 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:12,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 06:07:12,336 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:12,337 INFO L82 PathProgramCache]: Analyzing trace with hash -928384362, now seen corresponding path program 20 times [2021-05-06 06:07:12,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:12,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072413397] [2021-05-06 06:07:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:12,342 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:12,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397942796] [2021-05-06 06:07:12,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:12,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:07:12,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:12,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 88 conjunts are in the unsatisfiable core [2021-05-06 06:07:12,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:13,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:13,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:13,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:13,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:13,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:13,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:13,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072413397] [2021-05-06 06:07:13,356 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:13,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397942796] [2021-05-06 06:07:13,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397942796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:13,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:13,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-05-06 06:07:13,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657001936] [2021-05-06 06:07:13,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-06 06:07:13,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:13,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-06 06:07:13,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 06:07:13,357 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:14,052 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-06 06:07:14,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 06:07:14,052 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-06 06:07:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:14,053 INFO L225 Difference]: With dead ends: 58 [2021-05-06 06:07:14,053 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 06:07:14,053 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 887.5ms TimeCoverageRelationStatistics Valid=98, Invalid=2158, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 06:07:14,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 06:07:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 06:07:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-06 06:07:14,055 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-05-06 06:07:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:14,055 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-06 06:07:14,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-06 06:07:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 06:07:14,055 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:14,055 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:14,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:14,271 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:14,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:14,271 INFO L82 PathProgramCache]: Analyzing trace with hash 2087221236, now seen corresponding path program 21 times [2021-05-06 06:07:14,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:14,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356160059] [2021-05-06 06:07:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:14,276 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:14,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345110371] [2021-05-06 06:07:14,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:14,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-06 06:07:14,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:14,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 92 conjunts are in the unsatisfiable core [2021-05-06 06:07:14,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:15,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:15,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:15,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:15,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:15,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:15,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:15,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356160059] [2021-05-06 06:07:15,413 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:15,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345110371] [2021-05-06 06:07:15,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345110371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:15,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:15,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2021-05-06 06:07:15,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901014122] [2021-05-06 06:07:15,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-06 06:07:15,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:15,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-06 06:07:15,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 06:07:15,414 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:16,170 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-06 06:07:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 06:07:16,170 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-06 06:07:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:16,171 INFO L225 Difference]: With dead ends: 60 [2021-05-06 06:07:16,171 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 06:07:16,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1020.8ms TimeCoverageRelationStatistics Valid=102, Invalid=2348, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 06:07:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 06:07:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 06:07:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-06 06:07:16,172 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-05-06 06:07:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:16,173 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-06 06:07:16,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-06 06:07:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 06:07:16,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:16,173 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:16,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:16,374 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:16,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:16,374 INFO L82 PathProgramCache]: Analyzing trace with hash 981276114, now seen corresponding path program 22 times [2021-05-06 06:07:16,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:16,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933310884] [2021-05-06 06:07:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:16,379 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:16,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561216487] [2021-05-06 06:07:16,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:16,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:07:16,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:16,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-06 06:07:16,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:17,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:17,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:17,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:17,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:17,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:17,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:17,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933310884] [2021-05-06 06:07:17,546 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:17,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561216487] [2021-05-06 06:07:17,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561216487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:17,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:17,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2021-05-06 06:07:17,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520918479] [2021-05-06 06:07:17,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-06 06:07:17,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:17,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-06 06:07:17,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 06:07:17,547 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:18,363 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-06 06:07:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-06 06:07:18,363 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-06 06:07:18,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:18,364 INFO L225 Difference]: With dead ends: 62 [2021-05-06 06:07:18,364 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 06:07:18,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1074.5ms TimeCoverageRelationStatistics Valid=106, Invalid=2546, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 06:07:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 06:07:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-06 06:07:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-06 06:07:18,365 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-05-06 06:07:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:18,366 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-06 06:07:18,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-06 06:07:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 06:07:18,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:18,366 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:18,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-06 06:07:18,567 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:18,567 INFO L82 PathProgramCache]: Analyzing trace with hash -975064016, now seen corresponding path program 23 times [2021-05-06 06:07:18,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:18,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421879647] [2021-05-06 06:07:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:18,572 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:18,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16093680] [2021-05-06 06:07:18,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:18,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-06 06:07:18,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:18,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 100 conjunts are in the unsatisfiable core [2021-05-06 06:07:18,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:19,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:19,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:19,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:19,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:19,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:19,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:19,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421879647] [2021-05-06 06:07:19,814 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:19,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16093680] [2021-05-06 06:07:19,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16093680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:19,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:19,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-05-06 06:07:19,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917672972] [2021-05-06 06:07:19,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-06 06:07:19,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:19,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-06 06:07:19,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 06:07:19,816 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:20,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:20,672 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-06 06:07:20,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-06 06:07:20,672 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-06 06:07:20,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:20,673 INFO L225 Difference]: With dead ends: 64 [2021-05-06 06:07:20,673 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 06:07:20,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1140.6ms TimeCoverageRelationStatistics Valid=110, Invalid=2752, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 06:07:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 06:07:20,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 06:07:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-06 06:07:20,675 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-05-06 06:07:20,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:20,675 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-06 06:07:20,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:20,675 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-06 06:07:20,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 06:07:20,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:20,675 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:20,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:20,876 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:20,876 INFO L82 PathProgramCache]: Analyzing trace with hash 177746702, now seen corresponding path program 24 times [2021-05-06 06:07:20,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:20,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781178767] [2021-05-06 06:07:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:20,881 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:20,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684249756] [2021-05-06 06:07:20,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:20,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-06 06:07:20,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:20,944 WARN L261 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 105 conjunts are in the unsatisfiable core [2021-05-06 06:07:20,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:22,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:22,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:22,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:22,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:22,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:22,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:22,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781178767] [2021-05-06 06:07:22,347 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:22,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684249756] [2021-05-06 06:07:22,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684249756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:22,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:22,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2021-05-06 06:07:22,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965996648] [2021-05-06 06:07:22,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-06 06:07:22,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:22,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-06 06:07:22,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 06:07:22,348 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:23,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:23,321 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-06 06:07:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 06:07:23,321 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-06 06:07:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:23,322 INFO L225 Difference]: With dead ends: 66 [2021-05-06 06:07:23,322 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 06:07:23,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1356.3ms TimeCoverageRelationStatistics Valid=114, Invalid=2966, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 06:07:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 06:07:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 06:07:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-06 06:07:23,323 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-05-06 06:07:23,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:23,324 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-06 06:07:23,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-06 06:07:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 06:07:23,324 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:23,324 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:23,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-06 06:07:23,540 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:23,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:23,541 INFO L82 PathProgramCache]: Analyzing trace with hash -72715668, now seen corresponding path program 25 times [2021-05-06 06:07:23,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:23,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135141694] [2021-05-06 06:07:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:23,546 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:23,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247590876] [2021-05-06 06:07:23,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:23,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 108 conjunts are in the unsatisfiable core [2021-05-06 06:07:23,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:24,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:24,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:24,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:24,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:24,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:25,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:25,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135141694] [2021-05-06 06:07:25,013 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:25,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247590876] [2021-05-06 06:07:25,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247590876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:25,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:25,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2021-05-06 06:07:25,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432289546] [2021-05-06 06:07:25,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-06 06:07:25,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:25,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-06 06:07:25,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 06:07:25,014 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:25,995 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-06 06:07:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 06:07:25,995 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-06 06:07:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:25,995 INFO L225 Difference]: With dead ends: 68 [2021-05-06 06:07:25,995 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 06:07:25,996 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1354.7ms TimeCoverageRelationStatistics Valid=118, Invalid=3188, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 06:07:25,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 06:07:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 06:07:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-06 06:07:25,997 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-05-06 06:07:25,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:25,997 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-06 06:07:25,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:25,998 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-06 06:07:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 06:07:25,998 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:25,998 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:26,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:26,198 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:26,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:26,199 INFO L82 PathProgramCache]: Analyzing trace with hash -248884662, now seen corresponding path program 26 times [2021-05-06 06:07:26,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:26,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490071014] [2021-05-06 06:07:26,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:26,204 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:26,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867512123] [2021-05-06 06:07:26,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:26,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:07:26,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:26,261 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 112 conjunts are in the unsatisfiable core [2021-05-06 06:07:26,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:27,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:27,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:27,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:27,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:27,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:27,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:27,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490071014] [2021-05-06 06:07:27,759 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:27,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867512123] [2021-05-06 06:07:27,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867512123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:27,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:27,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2021-05-06 06:07:27,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000276376] [2021-05-06 06:07:27,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-06 06:07:27,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:27,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-06 06:07:27,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 06:07:27,760 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:28,880 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-06 06:07:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 06:07:28,893 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-06 06:07:28,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:28,894 INFO L225 Difference]: With dead ends: 70 [2021-05-06 06:07:28,894 INFO L226 Difference]: Without dead ends: 67 [2021-05-06 06:07:28,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1446.1ms TimeCoverageRelationStatistics Valid=122, Invalid=3418, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 06:07:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-06 06:07:28,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-06 06:07:28,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:28,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-06 06:07:28,896 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-05-06 06:07:28,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:28,896 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-06 06:07:28,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:28,896 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-06 06:07:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 06:07:28,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:28,896 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:29,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-06 06:07:29,110 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:29,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:29,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2043563352, now seen corresponding path program 27 times [2021-05-06 06:07:29,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:29,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108135088] [2021-05-06 06:07:29,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:29,115 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:29,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988215193] [2021-05-06 06:07:29,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:29,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-06 06:07:29,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:29,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 116 conjunts are in the unsatisfiable core [2021-05-06 06:07:29,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:30,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:30,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:30,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:30,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:30,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:30,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:30,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108135088] [2021-05-06 06:07:30,896 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:30,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988215193] [2021-05-06 06:07:30,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988215193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:30,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:30,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2021-05-06 06:07:30,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526775606] [2021-05-06 06:07:30,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-06 06:07:30,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:30,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-06 06:07:30,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3422, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 06:07:30,897 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:32,091 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-06 06:07:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-06 06:07:32,092 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-06 06:07:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:32,092 INFO L225 Difference]: With dead ends: 72 [2021-05-06 06:07:32,092 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 06:07:32,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1654.8ms TimeCoverageRelationStatistics Valid=126, Invalid=3656, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 06:07:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 06:07:32,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-06 06:07:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-06 06:07:32,094 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-05-06 06:07:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:32,095 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-06 06:07:32,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-06 06:07:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 06:07:32,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:32,095 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:32,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:32,311 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:32,311 INFO L82 PathProgramCache]: Analyzing trace with hash -152931450, now seen corresponding path program 28 times [2021-05-06 06:07:32,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:32,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309706040] [2021-05-06 06:07:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:32,316 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:32,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130457771] [2021-05-06 06:07:32,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:32,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:07:32,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:32,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 120 conjunts are in the unsatisfiable core [2021-05-06 06:07:32,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:33,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:34,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:34,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:34,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:34,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:34,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:34,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309706040] [2021-05-06 06:07:34,139 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:34,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130457771] [2021-05-06 06:07:34,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130457771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:34,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:34,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2021-05-06 06:07:34,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466626731] [2021-05-06 06:07:34,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-06 06:07:34,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:34,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-06 06:07:34,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3660, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 06:07:34,141 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:35,400 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-06 06:07:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 06:07:35,400 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-06 06:07:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:35,400 INFO L225 Difference]: With dead ends: 74 [2021-05-06 06:07:35,400 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 06:07:35,401 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1650.8ms TimeCoverageRelationStatistics Valid=130, Invalid=3902, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 06:07:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 06:07:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-06 06:07:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-06 06:07:35,402 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-05-06 06:07:35,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:35,402 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-06 06:07:35,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-06 06:07:35,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 06:07:35,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:35,403 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:35,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-06 06:07:35,615 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:35,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:35,615 INFO L82 PathProgramCache]: Analyzing trace with hash -26839836, now seen corresponding path program 29 times [2021-05-06 06:07:35,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:35,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981447971] [2021-05-06 06:07:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:35,621 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:35,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041465522] [2021-05-06 06:07:35,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:35,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-06 06:07:35,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:35,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 124 conjunts are in the unsatisfiable core [2021-05-06 06:07:35,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:37,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:37,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:37,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:37,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:37,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:37,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:37,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981447971] [2021-05-06 06:07:37,498 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:37,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041465522] [2021-05-06 06:07:37,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041465522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:37,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:37,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2021-05-06 06:07:37,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668718168] [2021-05-06 06:07:37,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-06 06:07:37,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:37,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-06 06:07:37,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 06:07:37,499 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:38,815 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-06 06:07:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-06 06:07:38,815 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-06 06:07:38,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:38,816 INFO L225 Difference]: With dead ends: 76 [2021-05-06 06:07:38,816 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 06:07:38,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1749.1ms TimeCoverageRelationStatistics Valid=134, Invalid=4156, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 06:07:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 06:07:38,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-06 06:07:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-06 06:07:38,818 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-05-06 06:07:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:38,818 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-06 06:07:38,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-06 06:07:38,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 06:07:38,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:38,818 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:39,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:39,029 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:39,029 INFO L82 PathProgramCache]: Analyzing trace with hash 888116930, now seen corresponding path program 30 times [2021-05-06 06:07:39,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:39,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853494474] [2021-05-06 06:07:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:39,035 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:39,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561373653] [2021-05-06 06:07:39,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:39,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-06 06:07:39,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:39,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 128 conjunts are in the unsatisfiable core [2021-05-06 06:07:39,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:40,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:40,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:40,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:40,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:41,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:41,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:41,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853494474] [2021-05-06 06:07:41,082 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:41,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561373653] [2021-05-06 06:07:41,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561373653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:41,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:41,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2021-05-06 06:07:41,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759195613] [2021-05-06 06:07:41,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-06 06:07:41,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:41,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-06 06:07:41,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=4160, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 06:07:41,083 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:42,503 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-06 06:07:42,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 06:07:42,504 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-06 06:07:42,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:42,504 INFO L225 Difference]: With dead ends: 78 [2021-05-06 06:07:42,504 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 06:07:42,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1912.6ms TimeCoverageRelationStatistics Valid=138, Invalid=4418, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 06:07:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 06:07:42,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 06:07:42,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-06 06:07:42,506 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-05-06 06:07:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:42,506 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-06 06:07:42,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-06 06:07:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 06:07:42,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:42,507 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:42,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:42,713 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:42,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:42,713 INFO L82 PathProgramCache]: Analyzing trace with hash -306726624, now seen corresponding path program 31 times [2021-05-06 06:07:42,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:42,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939957773] [2021-05-06 06:07:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:42,718 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:42,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885263074] [2021-05-06 06:07:42,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:42,776 WARN L261 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 132 conjunts are in the unsatisfiable core [2021-05-06 06:07:42,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:44,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:44,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:44,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:44,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:44,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:44,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:44,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939957773] [2021-05-06 06:07:44,952 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:44,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885263074] [2021-05-06 06:07:44,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885263074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:44,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:44,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2021-05-06 06:07:44,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186706507] [2021-05-06 06:07:44,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-06 06:07:44,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:44,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-06 06:07:44,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=4422, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 06:07:44,953 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:46,496 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-06 06:07:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-06 06:07:46,496 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-06 06:07:46,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:46,496 INFO L225 Difference]: With dead ends: 80 [2021-05-06 06:07:46,496 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 06:07:46,497 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2112.8ms TimeCoverageRelationStatistics Valid=142, Invalid=4688, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 06:07:46,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 06:07:46,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 06:07:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-06 06:07:46,498 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-05-06 06:07:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:46,498 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-06 06:07:46,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-06 06:07:46,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 06:07:46,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:46,499 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:46,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-06 06:07:46,713 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:46,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:46,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1795113986, now seen corresponding path program 32 times [2021-05-06 06:07:46,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:46,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348159533] [2021-05-06 06:07:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:46,718 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:46,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467755903] [2021-05-06 06:07:46,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:46,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:07:46,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:46,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 136 conjunts are in the unsatisfiable core [2021-05-06 06:07:46,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:48,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:48,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:48,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:48,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:49,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:49,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:49,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348159533] [2021-05-06 06:07:49,105 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:49,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467755903] [2021-05-06 06:07:49,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467755903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:49,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:49,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2021-05-06 06:07:49,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060546919] [2021-05-06 06:07:49,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-06 06:07:49,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:49,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-06 06:07:49,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4692, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 06:07:49,106 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:50,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:50,773 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-06 06:07:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-06 06:07:50,773 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-06 06:07:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:50,774 INFO L225 Difference]: With dead ends: 82 [2021-05-06 06:07:50,774 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 06:07:50,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2287.2ms TimeCoverageRelationStatistics Valid=146, Invalid=4966, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 06:07:50,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 06:07:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-06 06:07:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:50,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-06 06:07:50,776 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-05-06 06:07:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:50,776 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-06 06:07:50,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:50,776 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-06 06:07:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 06:07:50,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:50,776 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:50,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:50,991 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1911259300, now seen corresponding path program 33 times [2021-05-06 06:07:50,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:50,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498227454] [2021-05-06 06:07:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:50,996 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:50,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538741716] [2021-05-06 06:07:50,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:51,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-05-06 06:07:51,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:51,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 140 conjunts are in the unsatisfiable core [2021-05-06 06:07:51,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:53,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:53,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:53,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:53,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:53,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:53,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:53,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498227454] [2021-05-06 06:07:53,616 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:53,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538741716] [2021-05-06 06:07:53,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538741716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:53,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:53,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2021-05-06 06:07:53,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910370448] [2021-05-06 06:07:53,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-06 06:07:53,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:53,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-06 06:07:53,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4970, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 06:07:53,617 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:55,383 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-06 06:07:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-06 06:07:55,384 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-06 06:07:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:55,384 INFO L225 Difference]: With dead ends: 84 [2021-05-06 06:07:55,384 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 06:07:55,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2486.3ms TimeCoverageRelationStatistics Valid=150, Invalid=5252, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 06:07:55,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 06:07:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-06 06:07:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-06 06:07:55,386 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-05-06 06:07:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:55,386 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-06 06:07:55,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-06 06:07:55,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 06:07:55,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:55,387 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:55,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-06 06:07:55,593 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:55,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:55,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1857756358, now seen corresponding path program 34 times [2021-05-06 06:07:55,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:55,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413975437] [2021-05-06 06:07:55,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:55,599 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:07:55,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315570819] [2021-05-06 06:07:55,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:55,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:07:55,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:55,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 144 conjunts are in the unsatisfiable core [2021-05-06 06:07:55,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:57,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:58,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:58,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:58,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:58,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:58,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:58,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413975437] [2021-05-06 06:07:58,149 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:07:58,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315570819] [2021-05-06 06:07:58,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315570819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:58,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:07:58,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2021-05-06 06:07:58,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138025342] [2021-05-06 06:07:58,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-06 06:07:58,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:58,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-06 06:07:58,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=5256, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 06:07:58,150 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:59,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:59,933 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-06 06:07:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-06 06:07:59,933 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-06 06:07:59,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:59,934 INFO L225 Difference]: With dead ends: 86 [2021-05-06 06:07:59,934 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 06:07:59,934 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2438.8ms TimeCoverageRelationStatistics Valid=154, Invalid=5546, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 06:07:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 06:07:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-06 06:07:59,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-06 06:07:59,936 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-05-06 06:07:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:59,936 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-06 06:07:59,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:07:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-06 06:07:59,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 06:07:59,936 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:59,936 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:08:00,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:00,149 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:08:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:08:00,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1981036648, now seen corresponding path program 35 times [2021-05-06 06:08:00,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:08:00,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880244783] [2021-05-06 06:08:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:08:00,155 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:08:00,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220622789] [2021-05-06 06:08:00,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:00,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-05-06 06:08:00,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:08:00,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 148 conjunts are in the unsatisfiable core [2021-05-06 06:08:00,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:08:02,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:02,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:02,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:02,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:02,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:08:03,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:08:03,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880244783] [2021-05-06 06:08:03,001 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:08:03,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220622789] [2021-05-06 06:08:03,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220622789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:08:03,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:08:03,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2021-05-06 06:08:03,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865121481] [2021-05-06 06:08:03,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-06 06:08:03,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:08:03,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-06 06:08:03,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=5550, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 06:08:03,002 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:04,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:08:04,920 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-06 06:08:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-06 06:08:04,920 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-06 06:08:04,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:08:04,921 INFO L225 Difference]: With dead ends: 88 [2021-05-06 06:08:04,921 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 06:08:04,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2708.6ms TimeCoverageRelationStatistics Valid=158, Invalid=5848, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 06:08:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 06:08:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-06 06:08:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-06 06:08:04,923 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-05-06 06:08:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:08:04,923 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-06 06:08:04,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-06 06:08:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 06:08:04,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:08:04,923 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:08:05,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:05,137 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:08:05,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:08:05,137 INFO L82 PathProgramCache]: Analyzing trace with hash -194311050, now seen corresponding path program 36 times [2021-05-06 06:08:05,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:08:05,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251554398] [2021-05-06 06:08:05,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:08:05,143 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:08:05,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042309189] [2021-05-06 06:08:05,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:05,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-06 06:08:05,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:08:05,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 152 conjunts are in the unsatisfiable core [2021-05-06 06:08:05,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:08:07,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:07,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:07,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:07,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:07,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:08:08,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:08:08,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251554398] [2021-05-06 06:08:08,037 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:08:08,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042309189] [2021-05-06 06:08:08,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042309189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:08:08,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:08:08,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2021-05-06 06:08:08,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754204587] [2021-05-06 06:08:08,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-06 06:08:08,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:08:08,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-06 06:08:08,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5852, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 06:08:08,038 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:08:10,042 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-06 06:08:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-06 06:08:10,043 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-06 06:08:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:08:10,043 INFO L225 Difference]: With dead ends: 90 [2021-05-06 06:08:10,043 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 06:08:10,044 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2788.4ms TimeCoverageRelationStatistics Valid=162, Invalid=6158, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 06:08:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 06:08:10,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-06 06:08:10,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:10,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-06 06:08:10,045 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-05-06 06:08:10,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:08:10,045 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-06 06:08:10,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:10,045 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-06 06:08:10,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 06:08:10,046 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:08:10,046 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:08:10,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-05-06 06:08:10,257 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:08:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:08:10,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1137929772, now seen corresponding path program 37 times [2021-05-06 06:08:10,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:08:10,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065910937] [2021-05-06 06:08:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:08:10,263 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:08:10,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779789418] [2021-05-06 06:08:10,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:08:10,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 156 conjunts are in the unsatisfiable core [2021-05-06 06:08:10,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:08:12,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:13,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:13,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:13,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:13,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:08:13,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:08:13,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065910937] [2021-05-06 06:08:13,187 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:08:13,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779789418] [2021-05-06 06:08:13,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779789418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:08:13,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:08:13,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2021-05-06 06:08:13,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819389976] [2021-05-06 06:08:13,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-06 06:08:13,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:08:13,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-06 06:08:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=6162, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 06:08:13,188 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:08:15,259 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-06 06:08:15,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-06 06:08:15,259 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-06 06:08:15,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:08:15,259 INFO L225 Difference]: With dead ends: 92 [2021-05-06 06:08:15,259 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 06:08:15,260 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2845.5ms TimeCoverageRelationStatistics Valid=166, Invalid=6476, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 06:08:15,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 06:08:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 06:08:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-06 06:08:15,261 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-05-06 06:08:15,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:08:15,261 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-06 06:08:15,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:15,261 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-06 06:08:15,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 06:08:15,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:08:15,262 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:08:15,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:15,469 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:08:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:08:15,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1717422158, now seen corresponding path program 38 times [2021-05-06 06:08:15,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:08:15,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129864780] [2021-05-06 06:08:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:08:15,475 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:08:15,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622912863] [2021-05-06 06:08:15,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:15,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:08:15,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:08:15,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 160 conjunts are in the unsatisfiable core [2021-05-06 06:08:15,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:08:18,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:18,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:18,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:18,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:18,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:08:18,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:08:18,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129864780] [2021-05-06 06:08:18,300 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:08:18,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622912863] [2021-05-06 06:08:18,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622912863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:08:18,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:08:18,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2021-05-06 06:08:18,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775445002] [2021-05-06 06:08:18,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-06 06:08:18,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:08:18,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-06 06:08:18,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=6480, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 06:08:18,301 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:20,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:08:20,440 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-06 06:08:20,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-06 06:08:20,440 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-06 06:08:20,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:08:20,441 INFO L225 Difference]: With dead ends: 94 [2021-05-06 06:08:20,441 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 06:08:20,441 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2709.9ms TimeCoverageRelationStatistics Valid=170, Invalid=6802, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 06:08:20,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 06:08:20,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-05-06 06:08:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-06 06:08:20,443 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-05-06 06:08:20,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:08:20,443 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-06 06:08:20,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-06 06:08:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 06:08:20,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:08:20,443 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:08:20,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-06 06:08:20,657 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:08:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:08:20,657 INFO L82 PathProgramCache]: Analyzing trace with hash -263856624, now seen corresponding path program 39 times [2021-05-06 06:08:20,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:08:20,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237159640] [2021-05-06 06:08:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:08:20,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:08:20,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136881688] [2021-05-06 06:08:20,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:20,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-05-06 06:08:20,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:08:20,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 165 conjunts are in the unsatisfiable core [2021-05-06 06:08:20,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:08:23,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:23,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:23,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:23,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:23,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:08:23,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:08:23,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237159640] [2021-05-06 06:08:23,901 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:08:23,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136881688] [2021-05-06 06:08:23,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136881688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:08:23,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:08:23,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2021-05-06 06:08:23,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038889227] [2021-05-06 06:08:23,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-06 06:08:23,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:08:23,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-06 06:08:23,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=6806, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 06:08:23,902 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:26,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:08:26,226 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-06 06:08:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-06 06:08:26,231 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-06 06:08:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:08:26,231 INFO L225 Difference]: With dead ends: 96 [2021-05-06 06:08:26,231 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 06:08:26,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3061.4ms TimeCoverageRelationStatistics Valid=174, Invalid=7136, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 06:08:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 06:08:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 06:08:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-06 06:08:26,233 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-05-06 06:08:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:08:26,233 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-06 06:08:26,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-06 06:08:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 06:08:26,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:08:26,234 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:08:26,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:26,437 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:08:26,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:08:26,437 INFO L82 PathProgramCache]: Analyzing trace with hash 748250350, now seen corresponding path program 40 times [2021-05-06 06:08:26,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:08:26,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845008230] [2021-05-06 06:08:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:08:26,449 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:08:26,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259630586] [2021-05-06 06:08:26,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:26,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:08:26,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:08:26,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 168 conjunts are in the unsatisfiable core [2021-05-06 06:08:26,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:08:29,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:29,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:29,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:29,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:29,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:08:29,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:08:29,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845008230] [2021-05-06 06:08:29,960 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:08:29,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259630586] [2021-05-06 06:08:29,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259630586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:08:29,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:08:29,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2021-05-06 06:08:29,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116493779] [2021-05-06 06:08:29,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-06 06:08:29,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:08:29,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-06 06:08:29,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=7140, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 06:08:29,961 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:32,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:08:32,392 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-06 06:08:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-06 06:08:32,392 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-06 06:08:32,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:08:32,393 INFO L225 Difference]: With dead ends: 98 [2021-05-06 06:08:32,393 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 06:08:32,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3399.7ms TimeCoverageRelationStatistics Valid=178, Invalid=7478, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 06:08:32,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 06:08:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-06 06:08:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-06 06:08:32,395 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-05-06 06:08:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:08:32,395 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-06 06:08:32,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-06 06:08:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 06:08:32,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:08:32,395 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:08:32,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:32,596 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:08:32,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:08:32,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1574523828, now seen corresponding path program 41 times [2021-05-06 06:08:32,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:08:32,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605158058] [2021-05-06 06:08:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:08:32,602 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:08:32,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833333549] [2021-05-06 06:08:32,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:32,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-05-06 06:08:32,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:08:32,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 172 conjunts are in the unsatisfiable core [2021-05-06 06:08:32,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:08:36,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:36,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:36,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:36,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:36,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:08:36,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:08:36,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605158058] [2021-05-06 06:08:36,565 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:08:36,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833333549] [2021-05-06 06:08:36,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833333549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:08:36,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:08:36,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2021-05-06 06:08:36,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161091582] [2021-05-06 06:08:36,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-06 06:08:36,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:08:36,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-06 06:08:36,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=7482, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 06:08:36,566 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 88 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:39,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:08:39,153 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-06 06:08:39,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-06 06:08:39,154 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-06 06:08:39,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:08:39,154 INFO L225 Difference]: With dead ends: 100 [2021-05-06 06:08:39,154 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 06:08:39,155 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3813.7ms TimeCoverageRelationStatistics Valid=182, Invalid=7828, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 06:08:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 06:08:39,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-05-06 06:08:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-06 06:08:39,156 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-05-06 06:08:39,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:08:39,156 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-06 06:08:39,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:39,156 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-06 06:08:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 06:08:39,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:08:39,157 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:08:39,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:39,357 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:08:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:08:39,358 INFO L82 PathProgramCache]: Analyzing trace with hash -377514966, now seen corresponding path program 42 times [2021-05-06 06:08:39,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:08:39,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892531806] [2021-05-06 06:08:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:08:39,364 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:08:39,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925103575] [2021-05-06 06:08:39,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:39,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-06 06:08:39,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:08:39,464 WARN L261 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 177 conjunts are in the unsatisfiable core [2021-05-06 06:08:39,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:08:43,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:43,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:43,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:43,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:43,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:08:43,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:08:43,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892531806] [2021-05-06 06:08:43,522 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:08:43,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925103575] [2021-05-06 06:08:43,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925103575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:08:43,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:08:43,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2021-05-06 06:08:43,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432259320] [2021-05-06 06:08:43,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-06 06:08:43,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:08:43,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-06 06:08:43,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=7832, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 06:08:43,523 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:46,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:08:46,386 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-06 06:08:46,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-06 06:08:46,386 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-06 06:08:46,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:08:46,387 INFO L225 Difference]: With dead ends: 102 [2021-05-06 06:08:46,387 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 06:08:46,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4033.0ms TimeCoverageRelationStatistics Valid=186, Invalid=8186, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 06:08:46,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 06:08:46,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 06:08:46,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:46,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-06 06:08:46,389 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-05-06 06:08:46,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:08:46,389 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-06 06:08:46,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:46,389 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-06 06:08:46,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 06:08:46,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:08:46,389 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:08:46,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:46,601 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:08:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:08:46,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1103233912, now seen corresponding path program 43 times [2021-05-06 06:08:46,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:08:46,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365653471] [2021-05-06 06:08:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:08:46,607 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:08:46,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791038780] [2021-05-06 06:08:46,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:08:46,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 180 conjunts are in the unsatisfiable core [2021-05-06 06:08:46,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:08:50,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:50,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:50,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:50,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:50,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:08:50,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:08:50,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365653471] [2021-05-06 06:08:50,925 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:08:50,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791038780] [2021-05-06 06:08:50,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791038780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:08:50,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:08:50,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2021-05-06 06:08:50,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262786908] [2021-05-06 06:08:50,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-06 06:08:50,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:08:50,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-06 06:08:50,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=8190, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 06:08:50,927 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 92 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:53,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:08:53,744 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-06 06:08:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-06 06:08:53,744 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-06 06:08:53,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:08:53,744 INFO L225 Difference]: With dead ends: 104 [2021-05-06 06:08:53,745 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 06:08:53,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4156.9ms TimeCoverageRelationStatistics Valid=190, Invalid=8552, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 06:08:53,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 06:08:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 06:08:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-06 06:08:53,746 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-05-06 06:08:53,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:08:53,747 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-06 06:08:53,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:08:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-06 06:08:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 06:08:53,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:08:53,747 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:08:53,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-05-06 06:08:53,948 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:08:53,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:08:53,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1560528230, now seen corresponding path program 44 times [2021-05-06 06:08:53,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:08:53,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034503789] [2021-05-06 06:08:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:08:53,954 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:08:53,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819358068] [2021-05-06 06:08:53,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:08:54,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:08:54,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:08:54,029 WARN L261 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 184 conjunts are in the unsatisfiable core [2021-05-06 06:08:54,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:08:57,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:57,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:57,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:57,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:57,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:08:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:08:57,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:08:57,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034503789] [2021-05-06 06:08:57,952 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:08:57,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819358068] [2021-05-06 06:08:57,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819358068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:08:57,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:08:57,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2021-05-06 06:08:57,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778047214] [2021-05-06 06:08:57,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-06 06:08:57,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:08:57,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-06 06:08:57,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=8556, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 06:08:57,953 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 94 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:00,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:09:00,810 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-06 06:09:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-06 06:09:00,811 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-06 06:09:00,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:09:00,811 INFO L225 Difference]: With dead ends: 106 [2021-05-06 06:09:00,811 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 06:09:00,811 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3860.9ms TimeCoverageRelationStatistics Valid=194, Invalid=8926, Unknown=0, NotChecked=0, Total=9120 [2021-05-06 06:09:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 06:09:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 06:09:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-06 06:09:00,813 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-05-06 06:09:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:09:00,813 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-06 06:09:00,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-06 06:09:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 06:09:00,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:09:00,814 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:09:01,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-06 06:09:01,029 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:09:01,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:09:01,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1635438276, now seen corresponding path program 45 times [2021-05-06 06:09:01,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:09:01,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827118237] [2021-05-06 06:09:01,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:09:01,035 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:09:01,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581519498] [2021-05-06 06:09:01,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:09:01,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-05-06 06:09:01,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:09:01,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 188 conjunts are in the unsatisfiable core [2021-05-06 06:09:01,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:09:05,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:05,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:05,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:05,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:05,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:09:05,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:09:05,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827118237] [2021-05-06 06:09:05,537 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:09:05,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581519498] [2021-05-06 06:09:05,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581519498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:09:05,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:09:05,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2021-05-06 06:09:05,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831865768] [2021-05-06 06:09:05,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-06 06:09:05,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:09:05,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-06 06:09:05,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=8930, Unknown=0, NotChecked=0, Total=9120 [2021-05-06 06:09:05,539 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:08,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:09:08,624 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-06 06:09:08,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-06 06:09:08,624 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-06 06:09:08,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:09:08,625 INFO L225 Difference]: With dead ends: 108 [2021-05-06 06:09:08,625 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 06:09:08,625 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4320.8ms TimeCoverageRelationStatistics Valid=198, Invalid=9308, Unknown=0, NotChecked=0, Total=9506 [2021-05-06 06:09:08,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 06:09:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-05-06 06:09:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-06 06:09:08,627 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-05-06 06:09:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:09:08,627 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-06 06:09:08,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-06 06:09:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 06:09:08,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:09:08,627 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:09:08,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:09:08,844 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:09:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:09:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash 609548450, now seen corresponding path program 46 times [2021-05-06 06:09:08,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:09:08,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738632620] [2021-05-06 06:09:08,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:09:08,850 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:09:08,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270322161] [2021-05-06 06:09:08,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:09:08,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:09:08,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:09:08,925 WARN L261 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 192 conjunts are in the unsatisfiable core [2021-05-06 06:09:08,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:09:13,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:13,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:13,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:13,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:13,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:09:13,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:09:13,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738632620] [2021-05-06 06:09:13,456 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:09:13,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270322161] [2021-05-06 06:09:13,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270322161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:09:13,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:09:13,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2021-05-06 06:09:13,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70867547] [2021-05-06 06:09:13,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-06 06:09:13,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:09:13,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-06 06:09:13,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=9312, Unknown=0, NotChecked=0, Total=9506 [2021-05-06 06:09:13,457 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 98 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 97 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:16,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:09:16,570 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-06 06:09:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-06 06:09:16,574 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 97 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-05-06 06:09:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:09:16,574 INFO L225 Difference]: With dead ends: 110 [2021-05-06 06:09:16,574 INFO L226 Difference]: Without dead ends: 107 [2021-05-06 06:09:16,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4460.9ms TimeCoverageRelationStatistics Valid=202, Invalid=9698, Unknown=0, NotChecked=0, Total=9900 [2021-05-06 06:09:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-06 06:09:16,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-05-06 06:09:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-05-06 06:09:16,576 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-05-06 06:09:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:09:16,576 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-05-06 06:09:16,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 97 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:16,577 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-05-06 06:09:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-06 06:09:16,577 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:09:16,577 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:09:16,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:09:16,803 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:09:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:09:16,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1723063552, now seen corresponding path program 47 times [2021-05-06 06:09:16,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:09:16,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694507047] [2021-05-06 06:09:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:09:16,809 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:09:16,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984155580] [2021-05-06 06:09:16,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:09:16,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-05-06 06:09:16,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:09:16,898 WARN L261 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 196 conjunts are in the unsatisfiable core [2021-05-06 06:09:16,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:09:21,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:21,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:21,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:21,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:21,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:09:21,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:09:21,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694507047] [2021-05-06 06:09:21,747 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:09:21,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984155580] [2021-05-06 06:09:21,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984155580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:09:21,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:09:21,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2021-05-06 06:09:21,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692263378] [2021-05-06 06:09:21,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-06 06:09:21,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:09:21,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-06 06:09:21,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=9702, Unknown=0, NotChecked=0, Total=9900 [2021-05-06 06:09:21,748 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:09:25,090 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-06 06:09:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-06 06:09:25,090 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-05-06 06:09:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:09:25,091 INFO L225 Difference]: With dead ends: 112 [2021-05-06 06:09:25,091 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 06:09:25,091 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4761.9ms TimeCoverageRelationStatistics Valid=206, Invalid=10096, Unknown=0, NotChecked=0, Total=10302 [2021-05-06 06:09:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 06:09:25,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-06 06:09:25,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-05-06 06:09:25,093 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-05-06 06:09:25,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:09:25,093 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-05-06 06:09:25,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:25,093 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-05-06 06:09:25,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 06:09:25,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:09:25,093 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:09:25,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:09:25,306 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:09:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:09:25,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1390268962, now seen corresponding path program 48 times [2021-05-06 06:09:25,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:09:25,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221684746] [2021-05-06 06:09:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:09:25,315 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:09:25,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440855672] [2021-05-06 06:09:25,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:09:25,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-05-06 06:09:25,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:09:25,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 201 conjunts are in the unsatisfiable core [2021-05-06 06:09:25,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:09:30,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:30,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:30,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:30,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:30,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:09:30,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:09:30,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221684746] [2021-05-06 06:09:30,890 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:09:30,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440855672] [2021-05-06 06:09:30,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440855672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:09:30,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:09:30,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2021-05-06 06:09:30,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651291862] [2021-05-06 06:09:30,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-06 06:09:30,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:09:30,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-06 06:09:30,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=10100, Unknown=0, NotChecked=0, Total=10302 [2021-05-06 06:09:30,892 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 102 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:09:34,537 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-06 06:09:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-06 06:09:34,537 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2021-05-06 06:09:34,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:09:34,538 INFO L225 Difference]: With dead ends: 114 [2021-05-06 06:09:34,538 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 06:09:34,538 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5343.0ms TimeCoverageRelationStatistics Valid=210, Invalid=10502, Unknown=0, NotChecked=0, Total=10712 [2021-05-06 06:09:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 06:09:34,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 06:09:34,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:34,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-05-06 06:09:34,540 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-05-06 06:09:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:09:34,540 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-05-06 06:09:34,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-05-06 06:09:34,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 06:09:34,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:09:34,541 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:09:34,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-06 06:09:34,757 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:09:34,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:09:34,757 INFO L82 PathProgramCache]: Analyzing trace with hash 597752124, now seen corresponding path program 49 times [2021-05-06 06:09:34,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:09:34,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470682549] [2021-05-06 06:09:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:09:34,765 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:09:34,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972410896] [2021-05-06 06:09:34,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:09:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:09:34,861 WARN L261 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 204 conjunts are in the unsatisfiable core [2021-05-06 06:09:34,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:09:40,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:40,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:40,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:40,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:40,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:09:40,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:09:40,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470682549] [2021-05-06 06:09:40,641 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:09:40,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972410896] [2021-05-06 06:09:40,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972410896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:09:40,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:09:40,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2021-05-06 06:09:40,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811289042] [2021-05-06 06:09:40,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-06 06:09:40,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:09:40,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-06 06:09:40,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=10506, Unknown=0, NotChecked=0, Total=10712 [2021-05-06 06:09:40,643 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 104 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:44,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:09:44,350 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-06 06:09:44,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-06 06:09:44,350 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-05-06 06:09:44,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:09:44,351 INFO L225 Difference]: With dead ends: 116 [2021-05-06 06:09:44,351 INFO L226 Difference]: Without dead ends: 113 [2021-05-06 06:09:44,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5702.0ms TimeCoverageRelationStatistics Valid=214, Invalid=10916, Unknown=0, NotChecked=0, Total=11130 [2021-05-06 06:09:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-06 06:09:44,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-05-06 06:09:44,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-05-06 06:09:44,353 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-05-06 06:09:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:09:44,353 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-05-06 06:09:44,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:44,353 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-05-06 06:09:44,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-06 06:09:44,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:09:44,353 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:09:44,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:09:44,569 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:09:44,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:09:44,569 INFO L82 PathProgramCache]: Analyzing trace with hash -174430950, now seen corresponding path program 50 times [2021-05-06 06:09:44,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:09:44,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514265287] [2021-05-06 06:09:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:09:44,581 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:09:44,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786686825] [2021-05-06 06:09:44,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:09:44,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:09:44,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:09:44,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 208 conjunts are in the unsatisfiable core [2021-05-06 06:09:44,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:09:49,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:49,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:49,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:49,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:49,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:09:49,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:09:49,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514265287] [2021-05-06 06:09:49,663 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:09:49,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786686825] [2021-05-06 06:09:49,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786686825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:09:49,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:09:49,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2021-05-06 06:09:49,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703404718] [2021-05-06 06:09:49,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-06 06:09:49,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:09:49,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-06 06:09:49,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=10920, Unknown=0, NotChecked=0, Total=11130 [2021-05-06 06:09:49,664 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 106 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:53,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:09:53,316 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-06 06:09:53,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-06 06:09:53,316 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-05-06 06:09:53,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:09:53,317 INFO L225 Difference]: With dead ends: 118 [2021-05-06 06:09:53,317 INFO L226 Difference]: Without dead ends: 115 [2021-05-06 06:09:53,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4904.3ms TimeCoverageRelationStatistics Valid=218, Invalid=11338, Unknown=0, NotChecked=0, Total=11556 [2021-05-06 06:09:53,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-06 06:09:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-05-06 06:09:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:53,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-05-06 06:09:53,319 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-05-06 06:09:53,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:09:53,319 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-05-06 06:09:53,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:09:53,319 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-05-06 06:09:53,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 06:09:53,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:09:53,319 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:09:53,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-06 06:09:53,536 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:09:53,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:09:53,536 INFO L82 PathProgramCache]: Analyzing trace with hash 786977144, now seen corresponding path program 51 times [2021-05-06 06:09:53,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:09:53,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102821925] [2021-05-06 06:09:53,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:09:53,542 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:09:53,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288622741] [2021-05-06 06:09:53,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:09:53,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-05-06 06:09:53,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:09:53,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 212 conjunts are in the unsatisfiable core [2021-05-06 06:09:53,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:09:59,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:59,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:59,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:59,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:09:59,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:10:00,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:10:00,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102821925] [2021-05-06 06:10:00,062 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:10:00,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288622741] [2021-05-06 06:10:00,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288622741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:10:00,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:10:00,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2021-05-06 06:10:00,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516403655] [2021-05-06 06:10:00,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-06 06:10:00,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:10:00,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-06 06:10:00,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=11342, Unknown=0, NotChecked=0, Total=11556 [2021-05-06 06:10:00,063 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 108 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:04,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:10:04,084 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-06 06:10:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-06 06:10:04,084 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-05-06 06:10:04,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:10:04,085 INFO L225 Difference]: With dead ends: 120 [2021-05-06 06:10:04,085 INFO L226 Difference]: Without dead ends: 117 [2021-05-06 06:10:04,085 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6324.2ms TimeCoverageRelationStatistics Valid=222, Invalid=11768, Unknown=0, NotChecked=0, Total=11990 [2021-05-06 06:10:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-06 06:10:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-06 06:10:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-05-06 06:10:04,087 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-05-06 06:10:04,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:10:04,087 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-05-06 06:10:04,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:04,087 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-05-06 06:10:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 06:10:04,087 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:10:04,087 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:10:04,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-06 06:10:04,288 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:10:04,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:10:04,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1282186838, now seen corresponding path program 52 times [2021-05-06 06:10:04,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:10:04,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066940889] [2021-05-06 06:10:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:10:04,295 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:10:04,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137854240] [2021-05-06 06:10:04,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:10:04,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:10:04,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:10:04,388 WARN L261 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 216 conjunts are in the unsatisfiable core [2021-05-06 06:10:04,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:10:09,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:09,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:09,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:09,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:10,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:10:10,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:10:10,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066940889] [2021-05-06 06:10:10,187 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:10:10,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137854240] [2021-05-06 06:10:10,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137854240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:10:10,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:10:10,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2021-05-06 06:10:10,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023132573] [2021-05-06 06:10:10,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-06 06:10:10,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:10:10,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-06 06:10:10,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=11772, Unknown=0, NotChecked=0, Total=11990 [2021-05-06 06:10:10,188 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 110 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 states have internal predecessors, (112), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:10:14,138 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-06 06:10:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-06 06:10:14,138 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 states have internal predecessors, (112), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2021-05-06 06:10:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:10:14,139 INFO L225 Difference]: With dead ends: 122 [2021-05-06 06:10:14,139 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 06:10:14,139 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5723.4ms TimeCoverageRelationStatistics Valid=226, Invalid=12206, Unknown=0, NotChecked=0, Total=12432 [2021-05-06 06:10:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 06:10:14,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-06 06:10:14,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-05-06 06:10:14,141 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-05-06 06:10:14,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:10:14,141 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-05-06 06:10:14,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 states have internal predecessors, (112), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:14,141 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-05-06 06:10:14,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 06:10:14,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:10:14,141 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:10:14,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-05-06 06:10:14,351 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:10:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:10:14,351 INFO L82 PathProgramCache]: Analyzing trace with hash 437332916, now seen corresponding path program 53 times [2021-05-06 06:10:14,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:10:14,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411466684] [2021-05-06 06:10:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:10:14,356 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:10:14,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439195990] [2021-05-06 06:10:14,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:10:14,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-05-06 06:10:14,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:10:14,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 220 conjunts are in the unsatisfiable core [2021-05-06 06:10:14,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:10:19,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:20,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:20,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:20,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:20,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:10:20,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:10:20,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411466684] [2021-05-06 06:10:20,218 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:10:20,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439195990] [2021-05-06 06:10:20,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439195990] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:10:20,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:10:20,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2021-05-06 06:10:20,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332283845] [2021-05-06 06:10:20,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-06 06:10:20,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:10:20,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-06 06:10:20,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=12210, Unknown=0, NotChecked=0, Total=12432 [2021-05-06 06:10:20,220 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:24,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:10:24,247 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-05-06 06:10:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-06 06:10:24,248 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-05-06 06:10:24,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:10:24,248 INFO L225 Difference]: With dead ends: 124 [2021-05-06 06:10:24,248 INFO L226 Difference]: Without dead ends: 121 [2021-05-06 06:10:24,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5693.9ms TimeCoverageRelationStatistics Valid=230, Invalid=12652, Unknown=0, NotChecked=0, Total=12882 [2021-05-06 06:10:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-06 06:10:24,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-05-06 06:10:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-05-06 06:10:24,250 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-05-06 06:10:24,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:10:24,250 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-05-06 06:10:24,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:24,250 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-05-06 06:10:24,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-06 06:10:24,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:10:24,251 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:10:24,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-06 06:10:24,451 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:10:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:10:24,452 INFO L82 PathProgramCache]: Analyzing trace with hash 281532818, now seen corresponding path program 54 times [2021-05-06 06:10:24,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:10:24,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415408037] [2021-05-06 06:10:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:10:24,457 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:10:24,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873451710] [2021-05-06 06:10:24,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:10:24,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-05-06 06:10:24,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:10:24,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 224 conjunts are in the unsatisfiable core [2021-05-06 06:10:24,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:10:31,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:31,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:31,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:31,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:31,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:10:31,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:10:31,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415408037] [2021-05-06 06:10:31,373 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:10:31,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873451710] [2021-05-06 06:10:31,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873451710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:10:31,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:10:31,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2021-05-06 06:10:31,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584732140] [2021-05-06 06:10:31,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-06 06:10:31,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:10:31,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-06 06:10:31,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=12656, Unknown=0, NotChecked=0, Total=12882 [2021-05-06 06:10:31,375 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 114 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:35,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:10:35,803 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-05-06 06:10:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-06 06:10:35,803 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2021-05-06 06:10:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:10:35,804 INFO L225 Difference]: With dead ends: 126 [2021-05-06 06:10:35,804 INFO L226 Difference]: Without dead ends: 123 [2021-05-06 06:10:35,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6722.5ms TimeCoverageRelationStatistics Valid=234, Invalid=13106, Unknown=0, NotChecked=0, Total=13340 [2021-05-06 06:10:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-06 06:10:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-05-06 06:10:35,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-05-06 06:10:35,806 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-05-06 06:10:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:10:35,806 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-05-06 06:10:35,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-05-06 06:10:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 06:10:35,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:10:35,806 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:10:36,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:10:36,021 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:10:36,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:10:36,021 INFO L82 PathProgramCache]: Analyzing trace with hash 881494000, now seen corresponding path program 55 times [2021-05-06 06:10:36,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:10:36,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030036703] [2021-05-06 06:10:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:10:36,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:10:36,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465450632] [2021-05-06 06:10:36,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:10:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:10:36,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 228 conjunts are in the unsatisfiable core [2021-05-06 06:10:36,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:10:42,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:42,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:42,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:42,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:43,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:10:43,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:10:43,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030036703] [2021-05-06 06:10:43,195 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:10:43,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465450632] [2021-05-06 06:10:43,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465450632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:10:43,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:10:43,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2021-05-06 06:10:43,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345659704] [2021-05-06 06:10:43,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-06 06:10:43,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:10:43,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-06 06:10:43,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=13110, Unknown=0, NotChecked=0, Total=13340 [2021-05-06 06:10:43,197 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 116 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:10:47,772 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-05-06 06:10:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-06 06:10:47,773 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-05-06 06:10:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:10:47,774 INFO L225 Difference]: With dead ends: 128 [2021-05-06 06:10:47,774 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 06:10:47,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6999.9ms TimeCoverageRelationStatistics Valid=238, Invalid=13568, Unknown=0, NotChecked=0, Total=13806 [2021-05-06 06:10:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 06:10:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-06 06:10:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-05-06 06:10:47,776 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-05-06 06:10:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:10:47,776 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-05-06 06:10:47,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:47,776 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-05-06 06:10:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 06:10:47,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:10:47,777 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:10:47,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:10:47,985 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:10:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:10:47,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1918572238, now seen corresponding path program 56 times [2021-05-06 06:10:47,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:10:47,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842271726] [2021-05-06 06:10:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:10:47,991 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:10:47,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045946039] [2021-05-06 06:10:47,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:10:48,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:10:48,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:10:48,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 232 conjunts are in the unsatisfiable core [2021-05-06 06:10:48,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:10:54,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:54,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:54,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:54,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:55,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:10:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:10:55,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:10:55,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842271726] [2021-05-06 06:10:55,152 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:10:55,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045946039] [2021-05-06 06:10:55,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045946039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:10:55,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:10:55,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2021-05-06 06:10:55,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845103303] [2021-05-06 06:10:55,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-06 06:10:55,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:10:55,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-06 06:10:55,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=13572, Unknown=0, NotChecked=0, Total=13806 [2021-05-06 06:10:55,153 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 118 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:10:59,726 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-05-06 06:10:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-06 06:10:59,727 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-05-06 06:10:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:10:59,727 INFO L225 Difference]: With dead ends: 130 [2021-05-06 06:10:59,727 INFO L226 Difference]: Without dead ends: 127 [2021-05-06 06:10:59,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6992.2ms TimeCoverageRelationStatistics Valid=242, Invalid=14038, Unknown=0, NotChecked=0, Total=14280 [2021-05-06 06:10:59,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-06 06:10:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-06 06:10:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-05-06 06:10:59,729 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-05-06 06:10:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:10:59,729 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-05-06 06:10:59,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:10:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-05-06 06:10:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-06 06:10:59,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:10:59,730 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:10:59,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:10:59,930 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:10:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:10:59,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2118346284, now seen corresponding path program 57 times [2021-05-06 06:10:59,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:10:59,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797861650] [2021-05-06 06:10:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:10:59,937 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:10:59,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718775862] [2021-05-06 06:10:59,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:11:00,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-05-06 06:11:00,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:11:00,078 WARN L261 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 236 conjunts are in the unsatisfiable core [2021-05-06 06:11:00,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:11:07,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:08,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:08,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:08,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:08,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:11:08,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:11:08,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797861650] [2021-05-06 06:11:08,275 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:11:08,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718775862] [2021-05-06 06:11:08,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718775862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:11:08,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:11:08,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2021-05-06 06:11:08,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957919955] [2021-05-06 06:11:08,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-06 06:11:08,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:11:08,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-06 06:11:08,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=14042, Unknown=0, NotChecked=0, Total=14280 [2021-05-06 06:11:08,277 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 120 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:11:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:11:13,383 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-05-06 06:11:13,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-06 06:11:13,383 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-05-06 06:11:13,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:11:13,384 INFO L225 Difference]: With dead ends: 132 [2021-05-06 06:11:13,384 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 06:11:13,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8252.9ms TimeCoverageRelationStatistics Valid=246, Invalid=14516, Unknown=0, NotChecked=0, Total=14762 [2021-05-06 06:11:13,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 06:11:13,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-06 06:11:13,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:11:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-05-06 06:11:13,386 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-05-06 06:11:13,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:11:13,386 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-05-06 06:11:13,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:11:13,386 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-05-06 06:11:13,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-06 06:11:13,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:11:13,386 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:11:13,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-06 06:11:13,601 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:11:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:11:13,601 INFO L82 PathProgramCache]: Analyzing trace with hash 827676170, now seen corresponding path program 58 times [2021-05-06 06:11:13,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:11:13,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295774995] [2021-05-06 06:11:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:11:13,607 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:11:13,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359594735] [2021-05-06 06:11:13,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:11:13,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:11:13,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:11:13,694 WARN L261 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 240 conjunts are in the unsatisfiable core [2021-05-06 06:11:13,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:11:19,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:20,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:20,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:20,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:20,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:11:20,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:11:20,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295774995] [2021-05-06 06:11:20,300 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:11:20,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359594735] [2021-05-06 06:11:20,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359594735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:11:20,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:11:20,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2021-05-06 06:11:20,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743381277] [2021-05-06 06:11:20,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-06 06:11:20,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:11:20,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-06 06:11:20,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=14520, Unknown=0, NotChecked=0, Total=14762 [2021-05-06 06:11:20,301 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 122 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:11:25,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:11:25,050 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-05-06 06:11:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-06 06:11:25,051 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2021-05-06 06:11:25,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:11:25,052 INFO L225 Difference]: With dead ends: 134 [2021-05-06 06:11:25,052 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 06:11:25,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6515.1ms TimeCoverageRelationStatistics Valid=250, Invalid=15002, Unknown=0, NotChecked=0, Total=15252 [2021-05-06 06:11:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 06:11:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-06 06:11:25,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:11:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-05-06 06:11:25,054 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-05-06 06:11:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:11:25,054 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-05-06 06:11:25,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 122 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:11:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-05-06 06:11:25,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 06:11:25,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:11:25,054 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:11:25,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:11:25,255 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:11:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:11:25,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1739245160, now seen corresponding path program 59 times [2021-05-06 06:11:25,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:11:25,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864169027] [2021-05-06 06:11:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:11:25,261 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:11:25,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528610651] [2021-05-06 06:11:25,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:11:25,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2021-05-06 06:11:25,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:11:25,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 244 conjunts are in the unsatisfiable core [2021-05-06 06:11:25,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:11:32,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:32,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:32,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:32,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:32,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:11:32,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:11:32,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864169027] [2021-05-06 06:11:32,502 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:11:32,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528610651] [2021-05-06 06:11:32,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528610651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:11:32,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:11:32,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2021-05-06 06:11:32,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44959282] [2021-05-06 06:11:32,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-06 06:11:32,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:11:32,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-06 06:11:32,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=15006, Unknown=0, NotChecked=0, Total=15252 [2021-05-06 06:11:32,503 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 124 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:11:37,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:11:37,487 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-05-06 06:11:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-06 06:11:37,487 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-05-06 06:11:37,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:11:37,488 INFO L225 Difference]: With dead ends: 136 [2021-05-06 06:11:37,488 INFO L226 Difference]: Without dead ends: 133 [2021-05-06 06:11:37,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7068.9ms TimeCoverageRelationStatistics Valid=254, Invalid=15496, Unknown=0, NotChecked=0, Total=15750 [2021-05-06 06:11:37,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-06 06:11:37,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-05-06 06:11:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:11:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2021-05-06 06:11:37,490 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2021-05-06 06:11:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:11:37,490 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2021-05-06 06:11:37,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:11:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2021-05-06 06:11:37,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 06:11:37,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:11:37,490 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:11:37,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-06 06:11:37,691 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:11:37,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:11:37,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1583716166, now seen corresponding path program 60 times [2021-05-06 06:11:37,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:11:37,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115133850] [2021-05-06 06:11:37,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:11:37,697 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:11:37,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231660768] [2021-05-06 06:11:37,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:11:37,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2021-05-06 06:11:37,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:11:37,819 WARN L261 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 248 conjunts are in the unsatisfiable core [2021-05-06 06:11:37,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:11:44,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:45,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:45,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:45,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:45,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:11:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:11:45,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:11:45,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115133850] [2021-05-06 06:11:45,350 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:11:45,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231660768] [2021-05-06 06:11:45,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231660768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:11:45,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:11:45,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126] total 126 [2021-05-06 06:11:45,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057060248] [2021-05-06 06:11:45,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-06 06:11:45,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:11:45,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-06 06:11:45,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=15500, Unknown=0, NotChecked=0, Total=15750 [2021-05-06 06:11:45,351 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 126 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:11:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:11:50,840 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-05-06 06:11:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-06 06:11:50,841 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2021-05-06 06:11:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:11:50,841 INFO L225 Difference]: With dead ends: 138 [2021-05-06 06:11:50,841 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 06:11:50,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7603.0ms TimeCoverageRelationStatistics Valid=258, Invalid=15998, Unknown=0, NotChecked=0, Total=16256 [2021-05-06 06:11:50,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 06:11:50,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-06 06:11:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:11:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2021-05-06 06:11:50,843 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2021-05-06 06:11:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:11:50,843 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2021-05-06 06:11:50,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:11:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2021-05-06 06:11:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 06:11:50,844 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:11:50,844 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:11:51,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:11:51,049 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:11:51,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:11:51,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1850759004, now seen corresponding path program 61 times [2021-05-06 06:11:51,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:11:51,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024541160] [2021-05-06 06:11:51,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:11:51,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:11:51,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224717326] [2021-05-06 06:11:51,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:11:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:11:51,156 WARN L261 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 252 conjunts are in the unsatisfiable core [2021-05-06 06:11:51,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:12:00,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:00,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:00,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:00,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:00,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:12:00,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:12:00,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024541160] [2021-05-06 06:12:00,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:12:00,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224717326] [2021-05-06 06:12:00,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224717326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:12:00,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:12:00,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2021-05-06 06:12:00,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603707457] [2021-05-06 06:12:00,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-06 06:12:00,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:12:00,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-06 06:12:00,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=16002, Unknown=0, NotChecked=0, Total=16256 [2021-05-06 06:12:00,961 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:12:06,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:12:06,698 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-05-06 06:12:06,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-05-06 06:12:06,699 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2021-05-06 06:12:06,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:12:06,699 INFO L225 Difference]: With dead ends: 140 [2021-05-06 06:12:06,699 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 06:12:06,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 9852.3ms TimeCoverageRelationStatistics Valid=262, Invalid=16508, Unknown=0, NotChecked=0, Total=16770 [2021-05-06 06:12:06,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 06:12:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-06 06:12:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:12:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2021-05-06 06:12:06,701 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2021-05-06 06:12:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:12:06,702 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2021-05-06 06:12:06,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:12:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2021-05-06 06:12:06,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-06 06:12:06,702 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:12:06,702 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:12:06,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-06 06:12:06,917 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:12:06,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:12:06,917 INFO L82 PathProgramCache]: Analyzing trace with hash 448453250, now seen corresponding path program 62 times [2021-05-06 06:12:06,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:12:06,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741559247] [2021-05-06 06:12:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:12:06,923 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:12:06,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959146238] [2021-05-06 06:12:06,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:12:07,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:12:07,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:12:07,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 256 conjunts are in the unsatisfiable core [2021-05-06 06:12:07,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:12:15,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:15,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:15,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:15,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:16,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:12:16,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:12:16,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741559247] [2021-05-06 06:12:16,158 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:12:16,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959146238] [2021-05-06 06:12:16,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959146238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:12:16,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:12:16,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2021-05-06 06:12:16,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967062548] [2021-05-06 06:12:16,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-06 06:12:16,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:12:16,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-06 06:12:16,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=16512, Unknown=0, NotChecked=0, Total=16770 [2021-05-06 06:12:16,160 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:12:22,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:12:22,235 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-05-06 06:12:22,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-06 06:12:22,236 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2021-05-06 06:12:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:12:22,236 INFO L225 Difference]: With dead ends: 142 [2021-05-06 06:12:22,236 INFO L226 Difference]: Without dead ends: 139 [2021-05-06 06:12:22,237 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 9266.9ms TimeCoverageRelationStatistics Valid=266, Invalid=17026, Unknown=0, NotChecked=0, Total=17292 [2021-05-06 06:12:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-06 06:12:22,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-05-06 06:12:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:12:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2021-05-06 06:12:22,238 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2021-05-06 06:12:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:12:22,238 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2021-05-06 06:12:22,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:12:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2021-05-06 06:12:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 06:12:22,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:12:22,239 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:12:22,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:12:22,449 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:12:22,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:12:22,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1916728096, now seen corresponding path program 63 times [2021-05-06 06:12:22,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:12:22,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499948740] [2021-05-06 06:12:22,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:12:22,463 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:12:22,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506468761] [2021-05-06 06:12:22,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:12:22,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-05-06 06:12:22,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:12:22,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 260 conjunts are in the unsatisfiable core [2021-05-06 06:12:22,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:12:30,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:31,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:31,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:31,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:31,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:12:31,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:12:31,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499948740] [2021-05-06 06:12:31,357 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:12:31,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506468761] [2021-05-06 06:12:31,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506468761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:12:31,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:12:31,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132] total 132 [2021-05-06 06:12:31,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057507672] [2021-05-06 06:12:31,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-06 06:12:31,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:12:31,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-06 06:12:31,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=17030, Unknown=0, NotChecked=0, Total=17292 [2021-05-06 06:12:31,359 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:12:37,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:12:37,280 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2021-05-06 06:12:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-06 06:12:37,281 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2021-05-06 06:12:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:12:37,281 INFO L225 Difference]: With dead ends: 144 [2021-05-06 06:12:37,281 INFO L226 Difference]: Without dead ends: 141 [2021-05-06 06:12:37,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8657.9ms TimeCoverageRelationStatistics Valid=270, Invalid=17552, Unknown=0, NotChecked=0, Total=17822 [2021-05-06 06:12:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-06 06:12:37,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-06 06:12:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:12:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2021-05-06 06:12:37,283 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2021-05-06 06:12:37,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:12:37,284 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2021-05-06 06:12:37,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:12:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2021-05-06 06:12:37,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-06 06:12:37,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:12:37,284 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:12:37,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-05-06 06:12:37,494 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:12:37,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:12:37,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1476665278, now seen corresponding path program 64 times [2021-05-06 06:12:37,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:12:37,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495905566] [2021-05-06 06:12:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:12:37,500 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:12:37,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944053821] [2021-05-06 06:12:37,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:12:37,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:12:37,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:12:37,599 WARN L261 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 264 conjunts are in the unsatisfiable core [2021-05-06 06:12:37,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:12:50,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:51,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:51,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:51,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:51,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:12:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:12:51,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:12:51,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495905566] [2021-05-06 06:12:51,447 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:12:51,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944053821] [2021-05-06 06:12:51,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944053821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:12:51,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:12:51,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134] total 134 [2021-05-06 06:12:51,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121841088] [2021-05-06 06:12:51,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-06 06:12:51,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:12:51,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-06 06:12:51,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=17556, Unknown=0, NotChecked=0, Total=17822 [2021-05-06 06:12:51,449 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:12:58,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:12:58,583 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2021-05-06 06:12:58,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-06 06:12:58,583 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2021-05-06 06:12:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:12:58,584 INFO L225 Difference]: With dead ends: 146 [2021-05-06 06:12:58,584 INFO L226 Difference]: Without dead ends: 143 [2021-05-06 06:12:58,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 14062.4ms TimeCoverageRelationStatistics Valid=274, Invalid=18086, Unknown=0, NotChecked=0, Total=18360 [2021-05-06 06:12:58,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-06 06:12:58,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-05-06 06:12:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:12:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2021-05-06 06:12:58,586 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2021-05-06 06:12:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:12:58,586 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2021-05-06 06:12:58,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:12:58,586 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2021-05-06 06:12:58,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-06 06:12:58,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:12:58,587 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:12:58,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-06 06:12:58,787 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:12:58,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:12:58,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1647447268, now seen corresponding path program 65 times [2021-05-06 06:12:58,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:12:58,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475414479] [2021-05-06 06:12:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:12:58,797 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:12:58,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552969681] [2021-05-06 06:12:58,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:12:58,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-05-06 06:12:58,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:12:58,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 268 conjunts are in the unsatisfiable core [2021-05-06 06:12:58,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:13:08,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:08,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:08,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:08,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:09,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:13:09,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:13:09,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475414479] [2021-05-06 06:13:09,241 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:13:09,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552969681] [2021-05-06 06:13:09,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552969681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:13:09,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:13:09,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136] total 136 [2021-05-06 06:13:09,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217514478] [2021-05-06 06:13:09,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-06 06:13:09,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:13:09,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-06 06:13:09,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=18090, Unknown=0, NotChecked=0, Total=18360 [2021-05-06 06:13:09,242 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:13:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:13:15,581 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2021-05-06 06:13:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-05-06 06:13:15,582 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2021-05-06 06:13:15,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:13:15,582 INFO L225 Difference]: With dead ends: 148 [2021-05-06 06:13:15,582 INFO L226 Difference]: Without dead ends: 145 [2021-05-06 06:13:15,583 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 10232.3ms TimeCoverageRelationStatistics Valid=278, Invalid=18628, Unknown=0, NotChecked=0, Total=18906 [2021-05-06 06:13:15,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-06 06:13:15,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-06 06:13:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:13:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2021-05-06 06:13:15,584 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2021-05-06 06:13:15,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:13:15,584 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2021-05-06 06:13:15,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:13:15,584 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2021-05-06 06:13:15,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-06 06:13:15,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:13:15,585 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:13:15,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:13:15,789 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:13:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:13:15,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1737464070, now seen corresponding path program 66 times [2021-05-06 06:13:15,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:13:15,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823248125] [2021-05-06 06:13:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:13:15,802 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:13:15,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923661879] [2021-05-06 06:13:15,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:13:15,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-05-06 06:13:15,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:13:15,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 273 conjunts are in the unsatisfiable core [2021-05-06 06:13:15,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:13:27,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:27,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:27,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:27,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:27,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:13:27,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:13:27,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823248125] [2021-05-06 06:13:27,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:13:27,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923661879] [2021-05-06 06:13:27,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923661879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:13:27,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:13:27,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138] total 138 [2021-05-06 06:13:27,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112586373] [2021-05-06 06:13:27,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-06 06:13:27,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:13:27,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-06 06:13:27,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=18632, Unknown=0, NotChecked=0, Total=18906 [2021-05-06 06:13:27,707 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand has 138 states, 137 states have (on average 1.0218978102189782) internal successors, (140), 137 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:13:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:13:34,934 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-05-06 06:13:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-05-06 06:13:34,936 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 137 states have (on average 1.0218978102189782) internal successors, (140), 137 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2021-05-06 06:13:34,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:13:34,937 INFO L225 Difference]: With dead ends: 150 [2021-05-06 06:13:34,937 INFO L226 Difference]: Without dead ends: 147 [2021-05-06 06:13:34,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 11910.7ms TimeCoverageRelationStatistics Valid=282, Invalid=19178, Unknown=0, NotChecked=0, Total=19460 [2021-05-06 06:13:34,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-06 06:13:34,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-05-06 06:13:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 142 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:13:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2021-05-06 06:13:34,939 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2021-05-06 06:13:34,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:13:34,939 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2021-05-06 06:13:34,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 138 states, 137 states have (on average 1.0218978102189782) internal successors, (140), 137 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:13:34,939 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2021-05-06 06:13:34,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-06 06:13:34,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:13:34,940 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:13:35,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:13:35,153 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:13:35,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:13:35,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1950702424, now seen corresponding path program 67 times [2021-05-06 06:13:35,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:13:35,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026552499] [2021-05-06 06:13:35,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:13:35,159 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:13:35,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354582242] [2021-05-06 06:13:35,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:13:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:13:35,278 WARN L261 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 276 conjunts are in the unsatisfiable core [2021-05-06 06:13:35,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:13:44,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:44,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:44,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:44,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:44,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:13:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:13:44,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:13:44,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026552499] [2021-05-06 06:13:44,783 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:13:44,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354582242] [2021-05-06 06:13:44,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354582242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:13:44,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:13:44,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140] total 140 [2021-05-06 06:13:44,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692048987] [2021-05-06 06:13:44,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 140 states [2021-05-06 06:13:44,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:13:44,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-05-06 06:13:44,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=19182, Unknown=0, NotChecked=0, Total=19460 [2021-05-06 06:13:44,784 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand has 140 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:13:51,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:13:51,451 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2021-05-06 06:13:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-05-06 06:13:51,452 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2021-05-06 06:13:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:13:51,452 INFO L225 Difference]: With dead ends: 152 [2021-05-06 06:13:51,452 INFO L226 Difference]: Without dead ends: 149 [2021-05-06 06:13:51,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 9409.2ms TimeCoverageRelationStatistics Valid=286, Invalid=19736, Unknown=0, NotChecked=0, Total=20022 [2021-05-06 06:13:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-06 06:13:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-06 06:13:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0069444444444444) internal successors, (145), 144 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:13:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2021-05-06 06:13:51,455 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2021-05-06 06:13:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:13:51,455 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2021-05-06 06:13:51,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 140 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:13:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2021-05-06 06:13:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-06 06:13:51,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:13:51,455 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:13:51,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-06 06:13:51,672 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:13:51,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:13:51,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1364283338, now seen corresponding path program 68 times [2021-05-06 06:13:51,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:13:51,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23272560] [2021-05-06 06:13:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:13:51,678 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:13:51,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752607969] [2021-05-06 06:13:51,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:13:51,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:13:51,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:13:51,770 WARN L261 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 280 conjunts are in the unsatisfiable core [2021-05-06 06:13:51,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:14:01,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:02,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:02,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:02,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:02,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:14:02,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:14:02,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23272560] [2021-05-06 06:14:02,399 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:14:02,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752607969] [2021-05-06 06:14:02,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752607969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:14:02,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:14:02,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [142] total 142 [2021-05-06 06:14:02,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112966382] [2021-05-06 06:14:02,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 142 states [2021-05-06 06:14:02,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:14:02,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-05-06 06:14:02,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=19740, Unknown=0, NotChecked=0, Total=20022 [2021-05-06 06:14:02,401 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:14:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:14:09,311 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2021-05-06 06:14:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-05-06 06:14:09,311 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2021-05-06 06:14:09,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:14:09,312 INFO L225 Difference]: With dead ends: 154 [2021-05-06 06:14:09,312 INFO L226 Difference]: Without dead ends: 151 [2021-05-06 06:14:09,312 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 10536.4ms TimeCoverageRelationStatistics Valid=290, Invalid=20302, Unknown=0, NotChecked=0, Total=20592 [2021-05-06 06:14:09,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-06 06:14:09,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-06 06:14:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 146 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:14:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2021-05-06 06:14:09,314 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2021-05-06 06:14:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:14:09,314 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2021-05-06 06:14:09,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:14:09,314 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2021-05-06 06:14:09,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-06 06:14:09,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:14:09,315 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:14:09,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-06 06:14:09,529 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:14:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:14:09,529 INFO L82 PathProgramCache]: Analyzing trace with hash -199866988, now seen corresponding path program 69 times [2021-05-06 06:14:09,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:14:09,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94663064] [2021-05-06 06:14:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:14:09,535 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:14:09,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375461483] [2021-05-06 06:14:09,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:14:09,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2021-05-06 06:14:09,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:14:09,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 285 conjunts are in the unsatisfiable core [2021-05-06 06:14:09,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:14:22,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:22,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:22,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:22,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:22,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:14:22,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:14:22,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94663064] [2021-05-06 06:14:22,678 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:14:22,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375461483] [2021-05-06 06:14:22,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375461483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:14:22,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:14:22,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [144] total 144 [2021-05-06 06:14:22,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287354977] [2021-05-06 06:14:22,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 144 states [2021-05-06 06:14:22,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:14:22,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-05-06 06:14:22,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=20306, Unknown=0, NotChecked=0, Total=20592 [2021-05-06 06:14:22,680 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand has 144 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:14:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:14:30,607 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2021-05-06 06:14:30,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-05-06 06:14:30,608 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2021-05-06 06:14:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:14:30,608 INFO L225 Difference]: With dead ends: 156 [2021-05-06 06:14:30,608 INFO L226 Difference]: Without dead ends: 153 [2021-05-06 06:14:30,609 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12896.2ms TimeCoverageRelationStatistics Valid=294, Invalid=20876, Unknown=0, NotChecked=0, Total=21170 [2021-05-06 06:14:30,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-06 06:14:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-05-06 06:14:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0067567567567568) internal successors, (149), 148 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:14:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2021-05-06 06:14:30,610 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2021-05-06 06:14:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:14:30,611 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2021-05-06 06:14:30,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 144 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:14:30,611 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2021-05-06 06:14:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-05-06 06:14:30,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:14:30,611 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:14:30,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-06 06:14:30,812 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:14:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:14:30,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2112748402, now seen corresponding path program 70 times [2021-05-06 06:14:30,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:14:30,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210093545] [2021-05-06 06:14:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:14:30,818 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:14:30,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709497000] [2021-05-06 06:14:30,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:14:30,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:14:30,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:14:30,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 288 conjunts are in the unsatisfiable core [2021-05-06 06:14:30,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:14:43,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:43,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:43,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:43,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:44,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:14:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:14:44,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:14:44,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210093545] [2021-05-06 06:14:44,331 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:14:44,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709497000] [2021-05-06 06:14:44,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709497000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:14:44,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:14:44,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [146] total 146 [2021-05-06 06:14:44,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82967574] [2021-05-06 06:14:44,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 146 states [2021-05-06 06:14:44,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:14:44,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-05-06 06:14:44,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=20880, Unknown=0, NotChecked=0, Total=21170 [2021-05-06 06:14:44,333 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand has 146 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 145 states have internal predecessors, (148), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:14:51,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:14:51,887 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2021-05-06 06:14:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-05-06 06:14:51,887 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 145 states have internal predecessors, (148), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2021-05-06 06:14:51,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:14:51,888 INFO L225 Difference]: With dead ends: 158 [2021-05-06 06:14:51,888 INFO L226 Difference]: Without dead ends: 155 [2021-05-06 06:14:51,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13321.4ms TimeCoverageRelationStatistics Valid=298, Invalid=21458, Unknown=0, NotChecked=0, Total=21756 [2021-05-06 06:14:51,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-06 06:14:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-05-06 06:14:51,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 150 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:14:51,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2021-05-06 06:14:51,890 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2021-05-06 06:14:51,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:14:51,890 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2021-05-06 06:14:51,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 146 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 145 states have internal predecessors, (148), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:14:51,890 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2021-05-06 06:14:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 06:14:51,891 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:14:51,891 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:14:52,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:14:52,091 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:14:52,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:14:52,092 INFO L82 PathProgramCache]: Analyzing trace with hash -256921136, now seen corresponding path program 71 times [2021-05-06 06:14:52,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:14:52,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598927355] [2021-05-06 06:14:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:14:52,097 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:14:52,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617016824] [2021-05-06 06:14:52,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:14:52,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-05-06 06:14:52,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:14:52,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 292 conjunts are in the unsatisfiable core [2021-05-06 06:14:52,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:15:05,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:05,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:05,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:05,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:05,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:15:05,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:15:05,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598927355] [2021-05-06 06:15:05,584 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:15:05,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617016824] [2021-05-06 06:15:05,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617016824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:15:05,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:15:05,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [148] total 148 [2021-05-06 06:15:05,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083115947] [2021-05-06 06:15:05,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 148 states [2021-05-06 06:15:05,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:15:05,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-05-06 06:15:05,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=21462, Unknown=0, NotChecked=0, Total=21756 [2021-05-06 06:15:05,585 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand has 148 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:15:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:15:13,268 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2021-05-06 06:15:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-05-06 06:15:13,269 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2021-05-06 06:15:13,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:15:13,269 INFO L225 Difference]: With dead ends: 160 [2021-05-06 06:15:13,269 INFO L226 Difference]: Without dead ends: 157 [2021-05-06 06:15:13,270 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13242.6ms TimeCoverageRelationStatistics Valid=302, Invalid=22048, Unknown=0, NotChecked=0, Total=22350 [2021-05-06 06:15:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-06 06:15:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-05-06 06:15:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.006578947368421) internal successors, (153), 152 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:15:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2021-05-06 06:15:13,272 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2021-05-06 06:15:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:15:13,272 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2021-05-06 06:15:13,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 148 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:15:13,272 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2021-05-06 06:15:13,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-06 06:15:13,273 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:15:13,273 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:15:13,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:15:13,473 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:15:13,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:15:13,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1176680274, now seen corresponding path program 72 times [2021-05-06 06:15:13,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:15:13,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857379846] [2021-05-06 06:15:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:15:13,479 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:15:13,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704972575] [2021-05-06 06:15:13,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:15:13,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2021-05-06 06:15:13,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:15:13,630 WARN L261 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 297 conjunts are in the unsatisfiable core [2021-05-06 06:15:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:15:28,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:28,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:28,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:28,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:29,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:15:29,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:15:29,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857379846] [2021-05-06 06:15:29,309 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:15:29,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704972575] [2021-05-06 06:15:29,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704972575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:15:29,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:15:29,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [150] total 150 [2021-05-06 06:15:29,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635808405] [2021-05-06 06:15:29,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 150 states [2021-05-06 06:15:29,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:15:29,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2021-05-06 06:15:29,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=22052, Unknown=0, NotChecked=0, Total=22350 [2021-05-06 06:15:29,311 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand has 150 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:15:37,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:15:37,630 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2021-05-06 06:15:37,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-05-06 06:15:37,631 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2021-05-06 06:15:37,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:15:37,631 INFO L225 Difference]: With dead ends: 162 [2021-05-06 06:15:37,631 INFO L226 Difference]: Without dead ends: 159 [2021-05-06 06:15:37,632 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 15584.4ms TimeCoverageRelationStatistics Valid=306, Invalid=22646, Unknown=0, NotChecked=0, Total=22952 [2021-05-06 06:15:37,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-06 06:15:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-05-06 06:15:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 154 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:15:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2021-05-06 06:15:37,634 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2021-05-06 06:15:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:15:37,634 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2021-05-06 06:15:37,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 150 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:15:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2021-05-06 06:15:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-06 06:15:37,634 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:15:37,634 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:15:37,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:15:37,851 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:15:37,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:15:37,852 INFO L82 PathProgramCache]: Analyzing trace with hash -301948916, now seen corresponding path program 73 times [2021-05-06 06:15:37,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:15:37,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53594988] [2021-05-06 06:15:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:15:37,857 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:15:37,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824713572] [2021-05-06 06:15:37,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:15:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:15:37,985 WARN L261 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 300 conjunts are in the unsatisfiable core [2021-05-06 06:15:37,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:15:55,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:55,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:55,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:55,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:56,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:15:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:15:56,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:15:56,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53594988] [2021-05-06 06:15:56,400 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:15:56,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824713572] [2021-05-06 06:15:56,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824713572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:15:56,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:15:56,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [152] total 152 [2021-05-06 06:15:56,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265050236] [2021-05-06 06:15:56,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 152 states [2021-05-06 06:15:56,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:15:56,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-05-06 06:15:56,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=22650, Unknown=0, NotChecked=0, Total=22952 [2021-05-06 06:15:56,401 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand has 152 states, 151 states have (on average 1.0198675496688743) internal successors, (154), 151 states have internal predecessors, (154), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:16:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:16:04,787 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2021-05-06 06:16:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-05-06 06:16:04,788 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 151 states have (on average 1.0198675496688743) internal successors, (154), 151 states have internal predecessors, (154), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2021-05-06 06:16:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:16:04,788 INFO L225 Difference]: With dead ends: 164 [2021-05-06 06:16:04,788 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 06:16:04,789 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18328.4ms TimeCoverageRelationStatistics Valid=310, Invalid=23252, Unknown=0, NotChecked=0, Total=23562 [2021-05-06 06:16:04,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 06:16:04,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-05-06 06:16:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0064102564102564) internal successors, (157), 156 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:16:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2021-05-06 06:16:04,790 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2021-05-06 06:16:04,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:16:04,791 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2021-05-06 06:16:04,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 152 states, 151 states have (on average 1.0198675496688743) internal successors, (154), 151 states have internal predecessors, (154), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:16:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2021-05-06 06:16:04,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-06 06:16:04,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:16:04,791 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:16:05,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-06 06:16:05,008 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:16:05,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:16:05,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1498703894, now seen corresponding path program 74 times [2021-05-06 06:16:05,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:16:05,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890260299] [2021-05-06 06:16:05,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:16:05,014 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:16:05,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899994396] [2021-05-06 06:16:05,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:16:05,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:16:05,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:16:05,121 WARN L261 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 304 conjunts are in the unsatisfiable core [2021-05-06 06:16:05,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:16:22,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:16:22,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:16:22,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:16:22,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:16:23,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:16:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:16:23,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:16:23,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890260299] [2021-05-06 06:16:23,316 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:16:23,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899994396] [2021-05-06 06:16:23,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899994396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:16:23,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:16:23,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [154] total 154 [2021-05-06 06:16:23,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061155730] [2021-05-06 06:16:23,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 154 states [2021-05-06 06:16:23,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:16:23,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-05-06 06:16:23,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=23256, Unknown=0, NotChecked=0, Total=23562 [2021-05-06 06:16:23,317 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand has 154 states, 153 states have (on average 1.0196078431372548) internal successors, (156), 153 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:16:31,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:16:31,987 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2021-05-06 06:16:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-05-06 06:16:31,987 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 153 states have (on average 1.0196078431372548) internal successors, (156), 153 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2021-05-06 06:16:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:16:31,988 INFO L225 Difference]: With dead ends: 166 [2021-05-06 06:16:31,988 INFO L226 Difference]: Without dead ends: 163 [2021-05-06 06:16:31,988 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18153.6ms TimeCoverageRelationStatistics Valid=314, Invalid=23866, Unknown=0, NotChecked=0, Total=24180 [2021-05-06 06:16:31,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-06 06:16:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-05-06 06:16:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 158 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:16:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2021-05-06 06:16:31,990 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2021-05-06 06:16:31,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:16:31,990 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2021-05-06 06:16:31,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 154 states, 153 states have (on average 1.0196078431372548) internal successors, (156), 153 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:16:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2021-05-06 06:16:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-06 06:16:31,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:16:31,991 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:16:32,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:16:32,208 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:16:32,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:16:32,208 INFO L82 PathProgramCache]: Analyzing trace with hash -529002424, now seen corresponding path program 75 times [2021-05-06 06:16:32,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:16:32,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501142661] [2021-05-06 06:16:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:16:32,214 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:16:32,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430306054] [2021-05-06 06:16:32,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:16:32,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2021-05-06 06:16:32,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:16:32,439 WARN L261 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 308 conjunts are in the unsatisfiable core [2021-05-06 06:16:32,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:16:47,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:16:47,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:16:47,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:16:47,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:16:47,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:16:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:16:47,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:16:47,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501142661] [2021-05-06 06:16:47,701 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:16:47,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430306054] [2021-05-06 06:16:47,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430306054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:16:47,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:16:47,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [156] total 156 [2021-05-06 06:16:47,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152426927] [2021-05-06 06:16:47,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 156 states [2021-05-06 06:16:47,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:16:47,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2021-05-06 06:16:47,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=23870, Unknown=0, NotChecked=0, Total=24180 [2021-05-06 06:16:47,702 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand has 156 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:16:56,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:16:56,213 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2021-05-06 06:16:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2021-05-06 06:16:56,214 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2021-05-06 06:16:56,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:16:56,214 INFO L225 Difference]: With dead ends: 168 [2021-05-06 06:16:56,214 INFO L226 Difference]: Without dead ends: 165 [2021-05-06 06:16:56,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 15104.6ms TimeCoverageRelationStatistics Valid=318, Invalid=24488, Unknown=0, NotChecked=0, Total=24806 [2021-05-06 06:16:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-06 06:16:56,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-05-06 06:16:56,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.00625) internal successors, (161), 160 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:16:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2021-05-06 06:16:56,216 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2021-05-06 06:16:56,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:16:56,217 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2021-05-06 06:16:56,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 156 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:16:56,217 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2021-05-06 06:16:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-06 06:16:56,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:16:56,217 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:16:56,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:16:56,433 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:16:56,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:16:56,433 INFO L82 PathProgramCache]: Analyzing trace with hash -653792986, now seen corresponding path program 76 times [2021-05-06 06:16:56,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:16:56,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81898506] [2021-05-06 06:16:56,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:16:56,439 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:16:56,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010658137] [2021-05-06 06:16:56,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:16:56,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:16:56,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:16:56,701 WARN L261 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 312 conjunts are in the unsatisfiable core [2021-05-06 06:16:56,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:17:20,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:17:20,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:17:20,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:17:20,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:17:21,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:17:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:17:21,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:17:21,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81898506] [2021-05-06 06:17:21,417 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:17:21,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010658137] [2021-05-06 06:17:21,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010658137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:17:21,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:17:21,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [158] total 158 [2021-05-06 06:17:21,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138254516] [2021-05-06 06:17:21,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 158 states [2021-05-06 06:17:21,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:17:21,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-05-06 06:17:21,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=24492, Unknown=0, NotChecked=0, Total=24806 [2021-05-06 06:17:21,418 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 158 states, 157 states have (on average 1.019108280254777) internal successors, (160), 157 states have internal predecessors, (160), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:17:31,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:17:31,043 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2021-05-06 06:17:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-05-06 06:17:31,043 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 157 states have (on average 1.019108280254777) internal successors, (160), 157 states have internal predecessors, (160), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2021-05-06 06:17:31,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:17:31,044 INFO L225 Difference]: With dead ends: 170 [2021-05-06 06:17:31,044 INFO L226 Difference]: Without dead ends: 167 [2021-05-06 06:17:31,045 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24566.3ms TimeCoverageRelationStatistics Valid=322, Invalid=25118, Unknown=0, NotChecked=0, Total=25440 [2021-05-06 06:17:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-06 06:17:31,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-05-06 06:17:31,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 162 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:17:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2021-05-06 06:17:31,046 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2021-05-06 06:17:31,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:17:31,046 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2021-05-06 06:17:31,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 158 states, 157 states have (on average 1.019108280254777) internal successors, (160), 157 states have internal predecessors, (160), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:17:31,046 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2021-05-06 06:17:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-06 06:17:31,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:17:31,047 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:17:31,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:17:31,261 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:17:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:17:31,261 INFO L82 PathProgramCache]: Analyzing trace with hash -318438780, now seen corresponding path program 77 times [2021-05-06 06:17:31,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:17:31,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402432312] [2021-05-06 06:17:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:17:31,267 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:17:31,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008762035] [2021-05-06 06:17:31,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:17:31,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2021-05-06 06:17:31,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:17:31,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 316 conjunts are in the unsatisfiable core [2021-05-06 06:17:31,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:17:51,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:17:51,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:17:51,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:17:51,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:17:52,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:17:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:17:52,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:17:52,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402432312] [2021-05-06 06:17:52,429 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:17:52,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008762035] [2021-05-06 06:17:52,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008762035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:17:52,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:17:52,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [160] total 160 [2021-05-06 06:17:52,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147342261] [2021-05-06 06:17:52,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 160 states [2021-05-06 06:17:52,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:17:52,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2021-05-06 06:17:52,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=25122, Unknown=0, NotChecked=0, Total=25440 [2021-05-06 06:17:52,431 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand has 160 states, 159 states have (on average 1.0188679245283019) internal successors, (162), 159 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:18:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:18:01,732 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2021-05-06 06:18:01,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-05-06 06:18:01,732 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 159 states have (on average 1.0188679245283019) internal successors, (162), 159 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2021-05-06 06:18:01,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:18:01,733 INFO L225 Difference]: With dead ends: 172 [2021-05-06 06:18:01,733 INFO L226 Difference]: Without dead ends: 169 [2021-05-06 06:18:01,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20947.5ms TimeCoverageRelationStatistics Valid=326, Invalid=25756, Unknown=0, NotChecked=0, Total=26082 [2021-05-06 06:18:01,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-06 06:18:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-05-06 06:18:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0060975609756098) internal successors, (165), 164 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:18:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2021-05-06 06:18:01,735 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2021-05-06 06:18:01,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:18:01,735 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2021-05-06 06:18:01,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 160 states, 159 states have (on average 1.0188679245283019) internal successors, (162), 159 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:18:01,735 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2021-05-06 06:18:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-05-06 06:18:01,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:18:01,736 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:18:01,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:18:01,953 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:18:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:18:01,953 INFO L82 PathProgramCache]: Analyzing trace with hash -165594014, now seen corresponding path program 78 times [2021-05-06 06:18:01,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:18:01,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578282962] [2021-05-06 06:18:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:18:01,959 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:18:01,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713648960] [2021-05-06 06:18:01,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:18:02,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-05-06 06:18:02,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:18:02,108 WARN L261 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 320 conjunts are in the unsatisfiable core [2021-05-06 06:18:02,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:18:17,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:18:17,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:18:17,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:18:17,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:18:17,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:18:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:18:17,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:18:17,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578282962] [2021-05-06 06:18:17,659 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:18:17,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713648960] [2021-05-06 06:18:17,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713648960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:18:17,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:18:17,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [162] total 162 [2021-05-06 06:18:17,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17765871] [2021-05-06 06:18:17,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 162 states [2021-05-06 06:18:17,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:18:17,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2021-05-06 06:18:17,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=25760, Unknown=0, NotChecked=0, Total=26082 [2021-05-06 06:18:17,661 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand has 162 states, 161 states have (on average 1.0186335403726707) internal successors, (164), 161 states have internal predecessors, (164), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:18:26,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:18:26,912 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2021-05-06 06:18:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-05-06 06:18:26,912 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 161 states have (on average 1.0186335403726707) internal successors, (164), 161 states have internal predecessors, (164), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2021-05-06 06:18:26,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:18:26,913 INFO L225 Difference]: With dead ends: 174 [2021-05-06 06:18:26,913 INFO L226 Difference]: Without dead ends: 171 [2021-05-06 06:18:26,914 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 15446.7ms TimeCoverageRelationStatistics Valid=330, Invalid=26402, Unknown=0, NotChecked=0, Total=26732 [2021-05-06 06:18:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-06 06:18:26,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-05-06 06:18:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:18:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2021-05-06 06:18:26,915 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2021-05-06 06:18:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:18:26,915 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2021-05-06 06:18:26,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 162 states, 161 states have (on average 1.0186335403726707) internal successors, (164), 161 states have internal predecessors, (164), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:18:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2021-05-06 06:18:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-06 06:18:26,916 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:18:26,916 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:18:27,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:18:27,133 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:18:27,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:18:27,133 INFO L82 PathProgramCache]: Analyzing trace with hash 689338048, now seen corresponding path program 79 times [2021-05-06 06:18:27,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:18:27,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425276661] [2021-05-06 06:18:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:18:27,139 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:18:27,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478161274] [2021-05-06 06:18:27,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:18:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:18:27,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 324 conjunts are in the unsatisfiable core [2021-05-06 06:18:27,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:18:49,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:18:50,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:18:50,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:18:50,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:18:50,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:18:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:18:50,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:18:50,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425276661] [2021-05-06 06:18:50,923 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:18:50,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478161274] [2021-05-06 06:18:50,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478161274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:18:50,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:18:50,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [164] total 164 [2021-05-06 06:18:50,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460738957] [2021-05-06 06:18:50,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 164 states [2021-05-06 06:18:50,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:18:50,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2021-05-06 06:18:50,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=26406, Unknown=0, NotChecked=0, Total=26732 [2021-05-06 06:18:50,925 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 164 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:19:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:19:01,253 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2021-05-06 06:19:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-05-06 06:19:01,253 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2021-05-06 06:19:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:19:01,254 INFO L225 Difference]: With dead ends: 176 [2021-05-06 06:19:01,254 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 06:19:01,255 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24201.3ms TimeCoverageRelationStatistics Valid=334, Invalid=27056, Unknown=0, NotChecked=0, Total=27390 [2021-05-06 06:19:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 06:19:01,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 06:19:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.005952380952381) internal successors, (169), 168 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:19:01,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2021-05-06 06:19:01,257 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2021-05-06 06:19:01,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:19:01,257 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2021-05-06 06:19:01,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 164 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:19:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2021-05-06 06:19:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-06 06:19:01,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:19:01,258 INFO L523 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:19:01,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-06 06:19:01,474 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:19:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:19:01,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1940296094, now seen corresponding path program 80 times [2021-05-06 06:19:01,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:19:01,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027835125] [2021-05-06 06:19:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:19:01,481 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:19:01,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163592724] [2021-05-06 06:19:01,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:19:01,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:19:01,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:19:01,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 328 conjunts are in the unsatisfiable core [2021-05-06 06:19:01,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:19:25,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:19:25,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:19:25,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:19:25,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:19:26,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:19:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:19:26,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:19:26,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027835125] [2021-05-06 06:19:26,382 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:19:26,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163592724] [2021-05-06 06:19:26,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163592724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:19:26,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:19:26,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [166] total 166 [2021-05-06 06:19:26,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85913058] [2021-05-06 06:19:26,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 166 states [2021-05-06 06:19:26,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:19:26,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2021-05-06 06:19:26,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=27060, Unknown=0, NotChecked=0, Total=27390 [2021-05-06 06:19:26,384 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand has 166 states, 165 states have (on average 1.018181818181818) internal successors, (168), 165 states have internal predecessors, (168), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:19:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:19:36,351 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2021-05-06 06:19:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-05-06 06:19:36,351 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 165 states have (on average 1.018181818181818) internal successors, (168), 165 states have internal predecessors, (168), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2021-05-06 06:19:36,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:19:36,352 INFO L225 Difference]: With dead ends: 178 [2021-05-06 06:19:36,352 INFO L226 Difference]: Without dead ends: 175 [2021-05-06 06:19:36,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24698.6ms TimeCoverageRelationStatistics Valid=338, Invalid=27718, Unknown=0, NotChecked=0, Total=28056 [2021-05-06 06:19:36,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-06 06:19:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-05-06 06:19:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0058823529411764) internal successors, (171), 170 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:19:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2021-05-06 06:19:36,354 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2021-05-06 06:19:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:19:36,355 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2021-05-06 06:19:36,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 166 states, 165 states have (on average 1.018181818181818) internal successors, (168), 165 states have internal predecessors, (168), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:19:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2021-05-06 06:19:36,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-06 06:19:36,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:19:36,355 INFO L523 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:19:36,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:19:36,572 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:19:36,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:19:36,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1520135420, now seen corresponding path program 81 times [2021-05-06 06:19:36,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:19:36,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887477049] [2021-05-06 06:19:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:19:36,579 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:19:36,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736037534] [2021-05-06 06:19:36,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:19:36,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2021-05-06 06:19:36,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:19:36,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 332 conjunts are in the unsatisfiable core [2021-05-06 06:19:36,778 INFO L286 TraceCheckSpWp]: Computing forward predicates...