/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-c225d54 [2021-05-02 18:22:35,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:22:35,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:22:35,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:22:35,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:22:35,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:22:35,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:22:35,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:22:35,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:22:35,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:22:35,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:22:35,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-02 18:22:35,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:22:35,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:22:35,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:22:35,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:22:35,366 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:22:35,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:22:35,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:22:35,368 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:22:35,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:22:35,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:22:35,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:22:35,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:22:35,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:22:35,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:22:35,369 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:22:35,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:22:35,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:22:35,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:22:35,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:22:35,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:22:35,370 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:22:35,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:22:35,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:22:35,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:22:35,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:22:35,371 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:22:35,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:22:35,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:22:35,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:22:35,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:22:35,668 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:22:35,669 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:22:35,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i [2021-05-02 18:22:35,742 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f884a0cb8/cd158251594d4dc99871cb3f5a2d14b5/FLAGcb04bca0b [2021-05-02 18:22:36,326 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:22:36,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i [2021-05-02 18:22:36,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f884a0cb8/cd158251594d4dc99871cb3f5a2d14b5/FLAGcb04bca0b [2021-05-02 18:22:36,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f884a0cb8/cd158251594d4dc99871cb3f5a2d14b5 [2021-05-02 18:22:36,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:22:36,762 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:22:36,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:22:36,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:22:36,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:22:36,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:22:36" (1/1) ... [2021-05-02 18:22:36,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ac42bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:36, skipping insertion in model container [2021-05-02 18:22:36,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:22:36" (1/1) ... [2021-05-02 18:22:36,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:22:36,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:22:36,876 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] [2021-05-02 18:22:36,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:22:36,887 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:22:36,924 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] [2021-05-02 18:22:36,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:22:36,957 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:22:36,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:36 WrapperNode [2021-05-02 18:22:36,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:22:36,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:22:36,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:22:36,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:22:36,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:36" (1/1) ... [2021-05-02 18:22:36,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:36" (1/1) ... [2021-05-02 18:22:36,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:36" (1/1) ... [2021-05-02 18:22:36,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:36" (1/1) ... [2021-05-02 18:22:36,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:36" (1/1) ... [2021-05-02 18:22:36,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:36" (1/1) ... [2021-05-02 18:22:36,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:36" (1/1) ... [2021-05-02 18:22:36,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:22:36,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:22:36,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:22:36,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:22:36,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:36" (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 [2021-05-02 18:22:37,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:22:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:22:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:22:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:22:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:22:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:22:37,088 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:22:37,089 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:22:37,089 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:22:37,089 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:22:37,089 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:22:37,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:22:37,089 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:22:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:22:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:22:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:22:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:22:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:22:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:22:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:22:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:22:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:22:37,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:22:37,298 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:22:37,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:22:37 BoogieIcfgContainer [2021-05-02 18:22:37,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:22:37,300 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:22:37,300 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:22:37,300 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:22:37,302 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:22:37" (1/1) ... [2021-05-02 18:22:37,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:22:37 BasicIcfg [2021-05-02 18:22:37,332 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:22:37,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:22:37,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:22:37,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:22:37,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:22:36" (1/4) ... [2021-05-02 18:22:37,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2059d90e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:22:37, skipping insertion in model container [2021-05-02 18:22:37,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:36" (2/4) ... [2021-05-02 18:22:37,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2059d90e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:22:37, skipping insertion in model container [2021-05-02 18:22:37,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:22:37" (3/4) ... [2021-05-02 18:22:37,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2059d90e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:22:37, skipping insertion in model container [2021-05-02 18:22:37,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:22:37" (4/4) ... [2021-05-02 18:22:37,337 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.iJordan [2021-05-02 18:22:37,340 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:22:37,342 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:22:37,370 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:22:37,381 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:22:37,381 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:22:37,381 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:22:37,381 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:22:37,381 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:22:37,382 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:22:37,382 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:22:37,382 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:22:37,393 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) [2021-05-02 18:22:37,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 18:22:37,397 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:37,398 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:37,398 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:37,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:37,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1527693123, now seen corresponding path program 1 times [2021-05-02 18:22:37,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:37,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398137136] [2021-05-02 18:22:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:37,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:22:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:37,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:37,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398137136] [2021-05-02 18:22:37,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398137136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:22:37,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:22:37,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:22:37,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103857840] [2021-05-02 18:22:37,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:22:37,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:37,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:22:37,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:22:37,607 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) [2021-05-02 18:22:37,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:37,639 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-05-02 18:22:37,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:22:37,641 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 [2021-05-02 18:22:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:37,645 INFO L225 Difference]: With dead ends: 21 [2021-05-02 18:22:37,645 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 18:22:37,647 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:22:37,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 18:22:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 18:22:37,663 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) [2021-05-02 18:22:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 18:22:37,665 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 18:22:37,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:37,665 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 18:22:37,665 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) [2021-05-02 18:22:37,665 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 18:22:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 18:22:37,666 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:37,666 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:37,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:22:37,667 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:37,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1526769602, now seen corresponding path program 1 times [2021-05-02 18:22:37,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:37,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607170486] [2021-05-02 18:22:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:37,692 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:37,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028669934] [2021-05-02 18:22:37,692 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 [2021-05-02 18:22:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:37,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 18:22:37,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:37,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:37,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:37,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607170486] [2021-05-02 18:22:37,830 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:37,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028669934] [2021-05-02 18:22:37,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028669934] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:22:37,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:22:37,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:22:37,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565512558] [2021-05-02 18:22:37,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:22:37,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:37,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:22:37,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:22:37,833 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) [2021-05-02 18:22:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:37,841 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-05-02 18:22:37,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:22:37,842 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 [2021-05-02 18:22:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:37,842 INFO L225 Difference]: With dead ends: 16 [2021-05-02 18:22:37,842 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 18:22:37,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:22:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 18:22:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 18:22:37,844 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) [2021-05-02 18:22:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 18:22:37,845 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-02 18:22:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:37,845 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 18:22:37,845 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) [2021-05-02 18:22:37,845 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 18:22:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 18:22:37,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:37,846 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:38,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 18:22:38,063 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1730344036, now seen corresponding path program 1 times [2021-05-02 18:22:38,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:38,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061858983] [2021-05-02 18:22:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:38,072 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:38,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472836458] [2021-05-02 18:22:38,072 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 [2021-05-02 18:22:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:38,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 18:22:38,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:38,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:38,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:38,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:38,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:38,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:38,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061858983] [2021-05-02 18:22:38,278 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:38,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472836458] [2021-05-02 18:22:38,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472836458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:38,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:38,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 18:22:38,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440990340] [2021-05-02 18:22:38,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:22:38,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:38,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:22:38,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:22:38,280 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) [2021-05-02 18:22:38,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:38,369 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-02 18:22:38,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:22:38,369 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 [2021-05-02 18:22:38,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:38,370 INFO L225 Difference]: With dead ends: 20 [2021-05-02 18:22:38,370 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 18:22:38,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:22:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 18:22:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 18:22:38,372 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) [2021-05-02 18:22:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 18:22:38,372 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-02 18:22:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:38,372 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 18:22:38,372 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) [2021-05-02 18:22:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 18:22:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 18:22:38,373 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:38,373 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:38,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:22:38,589 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:38,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:38,589 INFO L82 PathProgramCache]: Analyzing trace with hash 203120506, now seen corresponding path program 2 times [2021-05-02 18:22:38,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:38,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076534246] [2021-05-02 18:22:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:38,598 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:38,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176046241] [2021-05-02 18:22:38,598 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 [2021-05-02 18:22:38,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:22:38,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:38,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 18:22:38,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:38,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:38,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:38,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:38,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:38,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:38,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076534246] [2021-05-02 18:22:38,775 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:38,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176046241] [2021-05-02 18:22:38,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176046241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:38,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:38,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 18:22:38,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640656379] [2021-05-02 18:22:38,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 18:22:38,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:38,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 18:22:38,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:22:38,777 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) [2021-05-02 18:22:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:38,831 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 18:22:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 18:22:38,831 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 [2021-05-02 18:22:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:38,832 INFO L225 Difference]: With dead ends: 22 [2021-05-02 18:22:38,832 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 18:22:38,832 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:22:38,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 18:22:38,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 18:22:38,834 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) [2021-05-02 18:22:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-02 18:22:38,834 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-02 18:22:38,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:38,835 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-02 18:22:38,835 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) [2021-05-02 18:22:38,835 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-02 18:22:38,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 18:22:38,835 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:38,835 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:39,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:22:39,053 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:39,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1458293800, now seen corresponding path program 3 times [2021-05-02 18:22:39,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:39,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434548907] [2021-05-02 18:22:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:39,063 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:39,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116688348] [2021-05-02 18:22:39,063 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 [2021-05-02 18:22:39,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 18:22:39,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:39,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 18:22:39,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:39,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:39,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:39,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:39,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:39,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:39,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434548907] [2021-05-02 18:22:39,228 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:39,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116688348] [2021-05-02 18:22:39,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116688348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:39,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:39,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 18:22:39,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368416450] [2021-05-02 18:22:39,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 18:22:39,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:39,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 18:22:39,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:22:39,229 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) [2021-05-02 18:22:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:39,294 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-02 18:22:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 18:22:39,295 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 [2021-05-02 18:22:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:39,295 INFO L225 Difference]: With dead ends: 24 [2021-05-02 18:22:39,295 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 18:22:39,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:22:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 18:22:39,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-02 18:22:39,297 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) [2021-05-02 18:22:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 18:22:39,297 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-05-02 18:22:39,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:39,298 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 18:22:39,298 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) [2021-05-02 18:22:39,298 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 18:22:39,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 18:22:39,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:39,298 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:39,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:22:39,516 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:39,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:39,517 INFO L82 PathProgramCache]: Analyzing trace with hash -349607754, now seen corresponding path program 4 times [2021-05-02 18:22:39,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:39,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408302899] [2021-05-02 18:22:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:39,524 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:39,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362294971] [2021-05-02 18:22:39,524 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 [2021-05-02 18:22:39,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:22:39,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:39,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 18:22:39,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:39,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:39,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:39,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:39,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:39,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:39,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408302899] [2021-05-02 18:22:39,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:39,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362294971] [2021-05-02 18:22:39,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362294971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:39,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:39,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 18:22:39,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708634651] [2021-05-02 18:22:39,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 18:22:39,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:39,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 18:22:39,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:22:39,744 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) [2021-05-02 18:22:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:39,832 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 18:22:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 18:22:39,832 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 [2021-05-02 18:22:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:39,833 INFO L225 Difference]: With dead ends: 26 [2021-05-02 18:22:39,833 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 18:22:39,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-05-02 18:22:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 18:22:39,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 18:22:39,835 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) [2021-05-02 18:22:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 18:22:39,835 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-05-02 18:22:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:39,835 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 18:22:39,836 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) [2021-05-02 18:22:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 18:22:39,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 18:22:39,836 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:39,836 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:40,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:22:40,054 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:40,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:40,054 INFO L82 PathProgramCache]: Analyzing trace with hash -54206956, now seen corresponding path program 5 times [2021-05-02 18:22:40,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:40,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283046175] [2021-05-02 18:22:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:40,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:40,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413677802] [2021-05-02 18:22:40,062 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 [2021-05-02 18:22:40,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 18:22:40,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:40,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 18:22:40,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:40,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:40,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:40,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:40,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:40,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:40,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283046175] [2021-05-02 18:22:40,298 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:40,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413677802] [2021-05-02 18:22:40,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413677802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:40,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:40,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 18:22:40,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065108571] [2021-05-02 18:22:40,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 18:22:40,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:40,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 18:22:40,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-05-02 18:22:40,300 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) [2021-05-02 18:22:40,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:40,399 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 18:22:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 18:22:40,400 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 [2021-05-02 18:22:40,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:40,400 INFO L225 Difference]: With dead ends: 28 [2021-05-02 18:22:40,400 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 18:22:40,401 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:22:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 18:22:40,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 18:22:40,402 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) [2021-05-02 18:22:40,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-02 18:22:40,403 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-05-02 18:22:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:40,403 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-02 18:22:40,403 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) [2021-05-02 18:22:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-02 18:22:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 18:22:40,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:40,404 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:40,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:22:40,622 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:40,622 INFO L82 PathProgramCache]: Analyzing trace with hash 358118386, now seen corresponding path program 6 times [2021-05-02 18:22:40,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:40,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332439920] [2021-05-02 18:22:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:40,629 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:40,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976433986] [2021-05-02 18:22:40,629 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 [2021-05-02 18:22:41,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 18:22:41,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:41,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 18:22:41,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:41,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:41,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:41,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:41,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:41,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:41,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332439920] [2021-05-02 18:22:41,672 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:41,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976433986] [2021-05-02 18:22:41,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976433986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:41,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:41,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 18:22:41,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564745747] [2021-05-02 18:22:41,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 18:22:41,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:41,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 18:22:41,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:22:41,673 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) [2021-05-02 18:22:41,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:41,792 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 18:22:41,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 18:22:41,792 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 [2021-05-02 18:22:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:41,793 INFO L225 Difference]: With dead ends: 30 [2021-05-02 18:22:41,793 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 18:22:41,793 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-05-02 18:22:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 18:22:41,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 18:22:41,794 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) [2021-05-02 18:22:41,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-02 18:22:41,795 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-05-02 18:22:41,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:41,795 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-02 18:22:41,795 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) [2021-05-02 18:22:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-02 18:22:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 18:22:41,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:41,796 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:42,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:22:42,012 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:42,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:42,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1465780816, now seen corresponding path program 7 times [2021-05-02 18:22:42,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:42,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732760199] [2021-05-02 18:22:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:42,020 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:42,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140438339] [2021-05-02 18:22:42,020 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 [2021-05-02 18:22:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:42,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 18:22:42,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:42,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:42,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:42,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:42,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:42,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:42,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732760199] [2021-05-02 18:22:42,281 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:42,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140438339] [2021-05-02 18:22:42,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140438339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:42,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:42,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 18:22:42,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061746883] [2021-05-02 18:22:42,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 18:22:42,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:42,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 18:22:42,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-05-02 18:22:42,282 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) [2021-05-02 18:22:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:42,424 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-02 18:22:42,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 18:22:42,425 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 [2021-05-02 18:22:42,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:42,425 INFO L225 Difference]: With dead ends: 32 [2021-05-02 18:22:42,425 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 18:22:42,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-05-02 18:22:42,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 18:22:42,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 18:22:42,427 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) [2021-05-02 18:22:42,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-02 18:22:42,427 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-05-02 18:22:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:42,428 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-02 18:22:42,428 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) [2021-05-02 18:22:42,428 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-02 18:22:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 18:22:42,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:42,428 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:42,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 18:22:42,649 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:42,649 INFO L82 PathProgramCache]: Analyzing trace with hash 777486638, now seen corresponding path program 8 times [2021-05-02 18:22:42,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:42,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328351490] [2021-05-02 18:22:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:42,656 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:42,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331545565] [2021-05-02 18:22:42,679 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 [2021-05-02 18:22:42,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:22:42,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:42,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 18:22:42,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:42,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:42,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:42,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:42,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:42,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:42,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328351490] [2021-05-02 18:22:42,991 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:42,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331545565] [2021-05-02 18:22:42,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331545565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:42,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:42,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 18:22:42,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351344803] [2021-05-02 18:22:42,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 18:22:42,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:42,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 18:22:42,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-05-02 18:22:42,992 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) [2021-05-02 18:22:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:43,156 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 18:22:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 18:22:43,156 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 [2021-05-02 18:22:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:43,156 INFO L225 Difference]: With dead ends: 34 [2021-05-02 18:22:43,156 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 18:22:43,157 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2021-05-02 18:22:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 18:22:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 18:22:43,158 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) [2021-05-02 18:22:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-02 18:22:43,159 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-05-02 18:22:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:43,159 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-02 18:22:43,159 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) [2021-05-02 18:22:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-02 18:22:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 18:22:43,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:43,160 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:43,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 18:22:43,378 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:43,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:43,378 INFO L82 PathProgramCache]: Analyzing trace with hash 751745164, now seen corresponding path program 9 times [2021-05-02 18:22:43,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:43,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320561734] [2021-05-02 18:22:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:43,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:43,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292350151] [2021-05-02 18:22:43,386 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 [2021-05-02 18:22:43,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 18:22:43,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:43,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 18:22:43,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:43,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:43,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:43,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:43,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:43,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:43,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320561734] [2021-05-02 18:22:43,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:43,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292350151] [2021-05-02 18:22:43,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292350151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:43,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:43,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-02 18:22:43,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150212016] [2021-05-02 18:22:43,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 18:22:43,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:43,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 18:22:43,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-05-02 18:22:43,835 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) [2021-05-02 18:22:44,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:44,059 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 18:22:44,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 18:22:44,060 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 [2021-05-02 18:22:44,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:44,060 INFO L225 Difference]: With dead ends: 36 [2021-05-02 18:22:44,060 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 18:22:44,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2021-05-02 18:22:44,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 18:22:44,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 18:22:44,062 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) [2021-05-02 18:22:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-02 18:22:44,062 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-05-02 18:22:44,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:44,063 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-02 18:22:44,063 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) [2021-05-02 18:22:44,063 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-02 18:22:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 18:22:44,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:44,063 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:44,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:22:44,281 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:44,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:44,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1783992426, now seen corresponding path program 10 times [2021-05-02 18:22:44,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:44,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049153798] [2021-05-02 18:22:44,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:44,289 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:44,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766923385] [2021-05-02 18:22:44,289 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 [2021-05-02 18:22:44,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:22:44,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:44,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 18:22:44,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:44,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:44,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:44,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:44,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:44,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:44,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049153798] [2021-05-02 18:22:44,783 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:44,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766923385] [2021-05-02 18:22:44,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766923385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:44,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:44,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-02 18:22:44,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22342808] [2021-05-02 18:22:44,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 18:22:44,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:44,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 18:22:44,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2021-05-02 18:22:44,784 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) [2021-05-02 18:22:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:45,102 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 18:22:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 18:22:45,103 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 [2021-05-02 18:22:45,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:45,103 INFO L225 Difference]: With dead ends: 38 [2021-05-02 18:22:45,103 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 18:22:45,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 414.4ms TimeCoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2021-05-02 18:22:45,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 18:22:45,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 18:22:45,105 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) [2021-05-02 18:22:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 18:22:45,106 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-05-02 18:22:45,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:45,106 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 18:22:45,106 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) [2021-05-02 18:22:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 18:22:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 18:22:45,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:45,106 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:45,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 18:22:45,307 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:45,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:45,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1636165832, now seen corresponding path program 11 times [2021-05-02 18:22:45,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:45,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486444549] [2021-05-02 18:22:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:45,314 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:45,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626962480] [2021-05-02 18:22:45,314 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 [2021-05-02 18:22:45,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 18:22:45,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:45,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 18:22:45,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:45,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:45,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:45,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:45,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:45,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:45,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486444549] [2021-05-02 18:22:45,894 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:45,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626962480] [2021-05-02 18:22:45,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626962480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:45,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:45,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-02 18:22:45,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453870560] [2021-05-02 18:22:45,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 18:22:45,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:45,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 18:22:45,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-05-02 18:22:45,909 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) [2021-05-02 18:22:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:46,235 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-02 18:22:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 18:22:46,235 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 [2021-05-02 18:22:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:46,237 INFO L225 Difference]: With dead ends: 40 [2021-05-02 18:22:46,238 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 18:22:46,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2021-05-02 18:22:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 18:22:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 18:22:46,242 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) [2021-05-02 18:22:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 18:22:46,242 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-05-02 18:22:46,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:46,244 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 18:22:46,244 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) [2021-05-02 18:22:46,244 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 18:22:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 18:22:46,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:46,245 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:46,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:22:46,460 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:46,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:46,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1308729766, now seen corresponding path program 12 times [2021-05-02 18:22:46,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:46,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082281833] [2021-05-02 18:22:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:46,467 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:46,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295650722] [2021-05-02 18:22:46,467 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 [2021-05-02 18:22:46,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 18:22:46,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:46,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 18:22:46,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:46,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:47,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:47,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:47,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:47,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:47,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082281833] [2021-05-02 18:22:47,081 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:47,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295650722] [2021-05-02 18:22:47,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295650722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:47,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:47,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-02 18:22:47,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507046119] [2021-05-02 18:22:47,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 18:22:47,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:47,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 18:22:47,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-05-02 18:22:47,083 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) [2021-05-02 18:22:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:47,453 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 18:22:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 18:22:47,454 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 [2021-05-02 18:22:47,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:47,454 INFO L225 Difference]: With dead ends: 42 [2021-05-02 18:22:47,454 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 18:22:47,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=66, Invalid=926, Unknown=0, NotChecked=0, Total=992 [2021-05-02 18:22:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 18:22:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 18:22:47,459 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) [2021-05-02 18:22:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 18:22:47,461 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 18:22:47,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:47,461 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 18:22:47,461 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) [2021-05-02 18:22:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 18:22:47,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 18:22:47,464 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:47,464 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:47,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 18:22:47,680 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:47,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:47,681 INFO L82 PathProgramCache]: Analyzing trace with hash 175282948, now seen corresponding path program 13 times [2021-05-02 18:22:47,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:47,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099137919] [2021-05-02 18:22:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:47,700 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:47,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979303521] [2021-05-02 18:22:47,700 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 [2021-05-02 18:22:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:47,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 18:22:47,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:48,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:48,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:48,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:48,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:48,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:48,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099137919] [2021-05-02 18:22:48,366 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:48,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979303521] [2021-05-02 18:22:48,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979303521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:48,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:48,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-05-02 18:22:48,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286583326] [2021-05-02 18:22:48,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 18:22:48,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:48,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 18:22:48,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2021-05-02 18:22:48,369 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) [2021-05-02 18:22:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:48,732 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-02 18:22:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 18:22:48,733 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 [2021-05-02 18:22:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:48,733 INFO L225 Difference]: With dead ends: 44 [2021-05-02 18:22:48,734 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 18:22:48,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 492.9ms TimeCoverageRelationStatistics Valid=70, Invalid=1052, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 18:22:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 18:22:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-02 18:22:48,745 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) [2021-05-02 18:22:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-02 18:22:48,746 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-05-02 18:22:48,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:48,746 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-02 18:22:48,746 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) [2021-05-02 18:22:48,746 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-02 18:22:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 18:22:48,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:48,746 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:48,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:22:48,967 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:48,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:48,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1854584034, now seen corresponding path program 14 times [2021-05-02 18:22:48,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:48,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306690699] [2021-05-02 18:22:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:48,973 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:48,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089776649] [2021-05-02 18:22:48,973 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 [2021-05-02 18:22:49,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:22:49,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 18:22:49,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:49,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:49,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:49,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:49,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:49,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:49,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306690699] [2021-05-02 18:22:49,727 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:49,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089776649] [2021-05-02 18:22:49,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089776649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:49,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:49,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-05-02 18:22:49,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870057271] [2021-05-02 18:22:49,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 18:22:49,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:49,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 18:22:49,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 18:22:49,729 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) [2021-05-02 18:22:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:50,143 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 18:22:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 18:22:50,144 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 [2021-05-02 18:22:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:50,144 INFO L225 Difference]: With dead ends: 46 [2021-05-02 18:22:50,144 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 18:22:50,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 579.0ms TimeCoverageRelationStatistics Valid=74, Invalid=1186, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 18:22:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 18:22:50,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 18:22:50,147 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) [2021-05-02 18:22:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-02 18:22:50,148 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-05-02 18:22:50,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:50,148 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-02 18:22:50,148 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) [2021-05-02 18:22:50,148 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-02 18:22:50,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 18:22:50,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:50,150 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:50,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 18:22:50,368 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:50,369 INFO L82 PathProgramCache]: Analyzing trace with hash 755224384, now seen corresponding path program 15 times [2021-05-02 18:22:50,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:50,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897199842] [2021-05-02 18:22:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:50,375 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:50,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550909885] [2021-05-02 18:22:50,375 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 [2021-05-02 18:22:50,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 18:22:50,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:50,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-02 18:22:50,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:51,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:51,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:51,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:51,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:51,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:51,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897199842] [2021-05-02 18:22:51,179 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:51,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550909885] [2021-05-02 18:22:51,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550909885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:51,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:51,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-02 18:22:51,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126008723] [2021-05-02 18:22:51,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 18:22:51,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:51,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 18:22:51,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 18:22:51,186 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) [2021-05-02 18:22:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:51,855 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-02 18:22:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 18:22:51,856 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 [2021-05-02 18:22:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:51,856 INFO L225 Difference]: With dead ends: 48 [2021-05-02 18:22:51,856 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 18:22:51,857 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 659.3ms TimeCoverageRelationStatistics Valid=78, Invalid=1328, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 18:22:51,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 18:22:51,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 18:22:51,860 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) [2021-05-02 18:22:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-02 18:22:51,862 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-05-02 18:22:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:51,862 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-02 18:22:51,862 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) [2021-05-02 18:22:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-02 18:22:51,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 18:22:51,863 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:51,863 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:52,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:22:52,079 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:52,079 INFO L82 PathProgramCache]: Analyzing trace with hash 832555550, now seen corresponding path program 16 times [2021-05-02 18:22:52,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:52,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478982930] [2021-05-02 18:22:52,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:52,110 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:52,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044392557] [2021-05-02 18:22:52,110 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 [2021-05-02 18:22:52,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:22:52,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:52,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-02 18:22:52,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:52,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:52,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:52,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:52,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:52,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:52,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478982930] [2021-05-02 18:22:52,980 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:52,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044392557] [2021-05-02 18:22:52,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044392557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:52,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:52,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-05-02 18:22:52,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521319001] [2021-05-02 18:22:52,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 18:22:52,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:52,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 18:22:52,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 18:22:52,983 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) [2021-05-02 18:22:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:53,511 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-02 18:22:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 18:22:53,512 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 [2021-05-02 18:22:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:53,513 INFO L225 Difference]: With dead ends: 50 [2021-05-02 18:22:53,513 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 18:22:53,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 743.7ms TimeCoverageRelationStatistics Valid=82, Invalid=1478, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 18:22:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 18:22:53,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 18:22:53,520 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) [2021-05-02 18:22:53,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-02 18:22:53,521 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-05-02 18:22:53,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:53,521 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-02 18:22:53,522 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) [2021-05-02 18:22:53,522 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-02 18:22:53,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 18:22:53,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:53,524 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:53,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 18:22:53,739 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:53,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2133362044, now seen corresponding path program 17 times [2021-05-02 18:22:53,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:53,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045626863] [2021-05-02 18:22:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:53,780 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:53,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507978250] [2021-05-02 18:22:53,781 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 [2021-05-02 18:22:53,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 18:22:53,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:53,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 79 conjunts are in the unsatisfiable core [2021-05-02 18:22:53,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:54,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:54,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:54,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:54,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:54,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:54,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045626863] [2021-05-02 18:22:54,699 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:54,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507978250] [2021-05-02 18:22:54,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507978250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:54,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:54,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-05-02 18:22:54,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590110221] [2021-05-02 18:22:54,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 18:22:54,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:54,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 18:22:54,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 18:22:54,700 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) [2021-05-02 18:22:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:55,300 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-02 18:22:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 18:22:55,300 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 [2021-05-02 18:22:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:55,301 INFO L225 Difference]: With dead ends: 52 [2021-05-02 18:22:55,301 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 18:22:55,301 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 791.8ms TimeCoverageRelationStatistics Valid=86, Invalid=1636, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 18:22:55,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 18:22:55,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 18:22:55,302 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) [2021-05-02 18:22:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-02 18:22:55,303 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-05-02 18:22:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:55,303 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-02 18:22:55,303 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) [2021-05-02 18:22:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-02 18:22:55,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 18:22:55,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:55,303 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:55,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 18:22:55,517 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:55,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:55,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1922047654, now seen corresponding path program 18 times [2021-05-02 18:22:55,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:55,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337789033] [2021-05-02 18:22:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:55,523 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:55,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771323060] [2021-05-02 18:22:55,523 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 [2021-05-02 18:22:55,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 18:22:55,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:55,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-02 18:22:55,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:56,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:56,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:56,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:56,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:56,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:56,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337789033] [2021-05-02 18:22:56,524 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:56,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771323060] [2021-05-02 18:22:56,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771323060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:56,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:56,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-05-02 18:22:56,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984237856] [2021-05-02 18:22:56,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 18:22:56,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:56,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 18:22:56,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 18:22:56,526 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) [2021-05-02 18:22:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:57,198 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-02 18:22:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 18:22:57,199 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 [2021-05-02 18:22:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:57,199 INFO L225 Difference]: With dead ends: 54 [2021-05-02 18:22:57,199 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 18:22:57,200 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 901.1ms TimeCoverageRelationStatistics Valid=90, Invalid=1802, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 18:22:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 18:22:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 18:22:57,201 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) [2021-05-02 18:22:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-02 18:22:57,201 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-05-02 18:22:57,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:57,201 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-02 18:22:57,201 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) [2021-05-02 18:22:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-02 18:22:57,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 18:22:57,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:57,202 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:57,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 18:22:57,403 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:57,403 INFO L82 PathProgramCache]: Analyzing trace with hash 659537336, now seen corresponding path program 19 times [2021-05-02 18:22:57,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:57,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317798858] [2021-05-02 18:22:57,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:57,409 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:57,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385774691] [2021-05-02 18:22:57,409 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 [2021-05-02 18:22:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:57,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-02 18:22:57,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:58,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:58,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:58,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:58,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:58,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:58,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317798858] [2021-05-02 18:22:58,525 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:22:58,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385774691] [2021-05-02 18:22:58,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385774691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:58,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:22:58,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-05-02 18:22:58,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414262972] [2021-05-02 18:22:58,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 18:22:58,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:58,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 18:22:58,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 18:22:58,527 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) [2021-05-02 18:22:59,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:59,232 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-02 18:22:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 18:22:59,233 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 [2021-05-02 18:22:59,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:59,233 INFO L225 Difference]: With dead ends: 56 [2021-05-02 18:22:59,233 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 18:22:59,233 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 967.2ms TimeCoverageRelationStatistics Valid=94, Invalid=1976, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 18:22:59,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 18:22:59,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 18:22:59,234 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) [2021-05-02 18:22:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-02 18:22:59,235 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-05-02 18:22:59,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:59,235 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-02 18:22:59,235 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) [2021-05-02 18:22:59,235 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-02 18:22:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 18:22:59,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:59,235 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:59,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 18:22:59,436 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:59,436 INFO L82 PathProgramCache]: Analyzing trace with hash -928384362, now seen corresponding path program 20 times [2021-05-02 18:22:59,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:59,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479985887] [2021-05-02 18:22:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:59,447 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:22:59,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167131006] [2021-05-02 18:22:59,448 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 [2021-05-02 18:22:59,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:22:59,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:59,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 92 conjunts are in the unsatisfiable core [2021-05-02 18:22:59,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:00,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:00,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:00,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:00,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:00,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:00,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479985887] [2021-05-02 18:23:00,690 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:00,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167131006] [2021-05-02 18:23:00,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167131006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:00,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:00,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-05-02 18:23:00,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035320750] [2021-05-02 18:23:00,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 18:23:00,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:00,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 18:23:00,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 18:23:00,692 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) [2021-05-02 18:23:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:01,503 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-02 18:23:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 18:23:01,503 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 [2021-05-02 18:23:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:01,503 INFO L225 Difference]: With dead ends: 58 [2021-05-02 18:23:01,503 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 18:23:01,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1129.5ms TimeCoverageRelationStatistics Valid=98, Invalid=2158, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 18:23:01,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 18:23:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 18:23:01,505 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) [2021-05-02 18:23:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-02 18:23:01,505 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-05-02 18:23:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:01,505 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-02 18:23:01,505 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) [2021-05-02 18:23:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-02 18:23:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 18:23:01,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:01,506 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:01,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:23:01,706 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:01,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:01,707 INFO L82 PathProgramCache]: Analyzing trace with hash 2087221236, now seen corresponding path program 21 times [2021-05-02 18:23:01,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:01,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981901539] [2021-05-02 18:23:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:01,714 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:01,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755596160] [2021-05-02 18:23:01,714 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 [2021-05-02 18:23:01,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 18:23:01,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:01,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 18:23:01,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:02,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:02,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:02,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:02,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:03,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:03,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981901539] [2021-05-02 18:23:03,026 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:03,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755596160] [2021-05-02 18:23:03,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755596160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:03,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:03,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2021-05-02 18:23:03,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328717719] [2021-05-02 18:23:03,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 18:23:03,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:03,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 18:23:03,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 18:23:03,027 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) [2021-05-02 18:23:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:03,885 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-02 18:23:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 18:23:03,886 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 [2021-05-02 18:23:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:03,886 INFO L225 Difference]: With dead ends: 60 [2021-05-02 18:23:03,886 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 18:23:03,887 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1136.8ms TimeCoverageRelationStatistics Valid=102, Invalid=2348, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 18:23:03,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 18:23:03,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-02 18:23:03,888 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) [2021-05-02 18:23:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-02 18:23:03,888 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-05-02 18:23:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:03,888 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-02 18:23:03,888 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) [2021-05-02 18:23:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-02 18:23:03,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 18:23:03,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:03,889 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:04,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:23:04,090 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:04,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:04,090 INFO L82 PathProgramCache]: Analyzing trace with hash 981276114, now seen corresponding path program 22 times [2021-05-02 18:23:04,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:04,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930339791] [2021-05-02 18:23:04,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:04,096 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:04,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764384147] [2021-05-02 18:23:04,096 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 [2021-05-02 18:23:04,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:23:04,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:04,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 99 conjunts are in the unsatisfiable core [2021-05-02 18:23:04,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:05,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:05,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:05,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:05,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:05,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:05,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930339791] [2021-05-02 18:23:05,370 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:05,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764384147] [2021-05-02 18:23:05,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764384147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:05,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:05,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2021-05-02 18:23:05,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975319678] [2021-05-02 18:23:05,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 18:23:05,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:05,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 18:23:05,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 18:23:05,371 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) [2021-05-02 18:23:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:06,272 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-02 18:23:06,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 18:23:06,272 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 [2021-05-02 18:23:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:06,273 INFO L225 Difference]: With dead ends: 62 [2021-05-02 18:23:06,273 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 18:23:06,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1186.4ms TimeCoverageRelationStatistics Valid=106, Invalid=2546, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 18:23:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 18:23:06,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 18:23:06,274 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) [2021-05-02 18:23:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-02 18:23:06,275 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-05-02 18:23:06,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:06,275 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-02 18:23:06,275 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) [2021-05-02 18:23:06,275 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-02 18:23:06,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 18:23:06,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:06,275 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:06,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-02 18:23:06,492 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:06,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:06,492 INFO L82 PathProgramCache]: Analyzing trace with hash -975064016, now seen corresponding path program 23 times [2021-05-02 18:23:06,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:06,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437214802] [2021-05-02 18:23:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:06,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:06,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781304663] [2021-05-02 18:23:06,502 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 [2021-05-02 18:23:06,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-02 18:23:06,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:06,551 WARN L261 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-02 18:23:06,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:07,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:07,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:07,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:07,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:07,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:07,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437214802] [2021-05-02 18:23:07,830 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:07,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781304663] [2021-05-02 18:23:07,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781304663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:07,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:07,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-05-02 18:23:07,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659746080] [2021-05-02 18:23:07,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 18:23:07,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:07,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 18:23:07,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 18:23:07,832 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) [2021-05-02 18:23:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:08,829 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-02 18:23:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 18:23:08,830 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 [2021-05-02 18:23:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:08,830 INFO L225 Difference]: With dead ends: 64 [2021-05-02 18:23:08,830 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 18:23:08,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1220.8ms TimeCoverageRelationStatistics Valid=110, Invalid=2752, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 18:23:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 18:23:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 18:23:08,832 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) [2021-05-02 18:23:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-02 18:23:08,832 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-05-02 18:23:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:08,832 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-02 18:23:08,832 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) [2021-05-02 18:23:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-02 18:23:08,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 18:23:08,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:08,833 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:09,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:23:09,048 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:09,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:09,049 INFO L82 PathProgramCache]: Analyzing trace with hash 177746702, now seen corresponding path program 24 times [2021-05-02 18:23:09,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:09,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894234354] [2021-05-02 18:23:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:09,057 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:09,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090830952] [2021-05-02 18:23:09,058 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 [2021-05-02 18:23:09,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 18:23:09,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:09,123 WARN L261 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 107 conjunts are in the unsatisfiable core [2021-05-02 18:23:09,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:10,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:10,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:10,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:10,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:10,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:10,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894234354] [2021-05-02 18:23:10,577 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:10,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090830952] [2021-05-02 18:23:10,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090830952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:10,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:10,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2021-05-02 18:23:10,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642382684] [2021-05-02 18:23:10,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 18:23:10,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:10,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 18:23:10,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 18:23:10,587 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) [2021-05-02 18:23:11,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:11,550 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-02 18:23:11,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 18:23:11,551 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 [2021-05-02 18:23:11,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:11,551 INFO L225 Difference]: With dead ends: 66 [2021-05-02 18:23:11,552 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 18:23:11,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1410.8ms TimeCoverageRelationStatistics Valid=114, Invalid=2966, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 18:23:11,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 18:23:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-02 18:23:11,553 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) [2021-05-02 18:23:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-02 18:23:11,553 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-05-02 18:23:11,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:11,554 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-02 18:23:11,554 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) [2021-05-02 18:23:11,554 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-02 18:23:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 18:23:11,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:11,554 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:11,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 18:23:11,760 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:11,760 INFO L82 PathProgramCache]: Analyzing trace with hash -72715668, now seen corresponding path program 25 times [2021-05-02 18:23:11,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:11,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482649641] [2021-05-02 18:23:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:11,769 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:11,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541395885] [2021-05-02 18:23:11,770 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 [2021-05-02 18:23:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:23:11,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 111 conjunts are in the unsatisfiable core [2021-05-02 18:23:11,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:13,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:13,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:13,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:13,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:13,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:13,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482649641] [2021-05-02 18:23:13,189 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:13,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541395885] [2021-05-02 18:23:13,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541395885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:13,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:13,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2021-05-02 18:23:13,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232493759] [2021-05-02 18:23:13,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 18:23:13,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:13,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 18:23:13,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 18:23:13,206 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) [2021-05-02 18:23:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:14,348 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-02 18:23:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 18:23:14,348 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 [2021-05-02 18:23:14,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:14,349 INFO L225 Difference]: With dead ends: 68 [2021-05-02 18:23:14,349 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 18:23:14,349 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1330.4ms TimeCoverageRelationStatistics Valid=118, Invalid=3188, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 18:23:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 18:23:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 18:23:14,350 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) [2021-05-02 18:23:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-02 18:23:14,351 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-05-02 18:23:14,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:14,351 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-02 18:23:14,351 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) [2021-05-02 18:23:14,351 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-02 18:23:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 18:23:14,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:14,351 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:14,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:23:14,552 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:14,553 INFO L82 PathProgramCache]: Analyzing trace with hash -248884662, now seen corresponding path program 26 times [2021-05-02 18:23:14,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:14,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088553186] [2021-05-02 18:23:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:14,558 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:14,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239695718] [2021-05-02 18:23:14,558 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 [2021-05-02 18:23:14,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:23:14,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:14,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 115 conjunts are in the unsatisfiable core [2021-05-02 18:23:14,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:16,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:16,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:16,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:16,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:16,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:16,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088553186] [2021-05-02 18:23:16,298 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:16,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239695718] [2021-05-02 18:23:16,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239695718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:16,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:16,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2021-05-02 18:23:16,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156490702] [2021-05-02 18:23:16,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 18:23:16,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:16,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 18:23:16,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 18:23:16,299 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) [2021-05-02 18:23:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:17,530 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-02 18:23:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 18:23:17,531 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 [2021-05-02 18:23:17,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:17,531 INFO L225 Difference]: With dead ends: 70 [2021-05-02 18:23:17,531 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 18:23:17,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1584.9ms TimeCoverageRelationStatistics Valid=122, Invalid=3418, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 18:23:17,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 18:23:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-02 18:23:17,532 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) [2021-05-02 18:23:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-02 18:23:17,533 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-05-02 18:23:17,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:17,533 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-02 18:23:17,533 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) [2021-05-02 18:23:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-02 18:23:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 18:23:17,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:17,533 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:17,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 18:23:17,734 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:17,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2043563352, now seen corresponding path program 27 times [2021-05-02 18:23:17,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:17,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137377612] [2021-05-02 18:23:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:17,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:17,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292029640] [2021-05-02 18:23:17,740 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 [2021-05-02 18:23:17,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 18:23:17,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:17,823 WARN L261 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 120 conjunts are in the unsatisfiable core [2021-05-02 18:23:17,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:19,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:19,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:19,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:19,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:19,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:19,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137377612] [2021-05-02 18:23:19,607 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:19,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292029640] [2021-05-02 18:23:19,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292029640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:19,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:19,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2021-05-02 18:23:19,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046191642] [2021-05-02 18:23:19,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 18:23:19,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:19,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 18:23:19,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3422, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 18:23:19,608 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) [2021-05-02 18:23:20,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:20,579 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-02 18:23:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 18:23:20,579 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 [2021-05-02 18:23:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:20,580 INFO L225 Difference]: With dead ends: 72 [2021-05-02 18:23:20,580 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 18:23:20,581 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1718.7ms TimeCoverageRelationStatistics Valid=126, Invalid=3656, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 18:23:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 18:23:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-02 18:23:20,583 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) [2021-05-02 18:23:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-02 18:23:20,583 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-05-02 18:23:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:20,583 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-02 18:23:20,583 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) [2021-05-02 18:23:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-02 18:23:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 18:23:20,584 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:20,584 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:20,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:23:20,800 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:20,800 INFO L82 PathProgramCache]: Analyzing trace with hash -152931450, now seen corresponding path program 28 times [2021-05-02 18:23:20,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:20,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232013055] [2021-05-02 18:23:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:20,806 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:20,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363123852] [2021-05-02 18:23:20,806 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 [2021-05-02 18:23:20,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:23:20,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:20,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 123 conjunts are in the unsatisfiable core [2021-05-02 18:23:20,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:22,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:22,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:22,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:22,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:22,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:22,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232013055] [2021-05-02 18:23:22,193 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:22,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363123852] [2021-05-02 18:23:22,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363123852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:22,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:22,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2021-05-02 18:23:22,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168411180] [2021-05-02 18:23:22,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 18:23:22,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:22,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 18:23:22,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3660, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 18:23:22,194 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) [2021-05-02 18:23:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:23,141 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-02 18:23:23,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 18:23:23,141 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 [2021-05-02 18:23:23,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:23,142 INFO L225 Difference]: With dead ends: 74 [2021-05-02 18:23:23,142 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 18:23:23,142 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1278.8ms TimeCoverageRelationStatistics Valid=130, Invalid=3902, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 18:23:23,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 18:23:23,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 18:23:23,143 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) [2021-05-02 18:23:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-02 18:23:23,143 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-05-02 18:23:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:23,144 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-02 18:23:23,144 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) [2021-05-02 18:23:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-02 18:23:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 18:23:23,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:23,144 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:23,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-02 18:23:23,359 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:23,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:23,360 INFO L82 PathProgramCache]: Analyzing trace with hash -26839836, now seen corresponding path program 29 times [2021-05-02 18:23:23,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:23,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944880427] [2021-05-02 18:23:23,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:23,365 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:23,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088572830] [2021-05-02 18:23:23,365 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 [2021-05-02 18:23:23,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-02 18:23:23,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:23,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 127 conjunts are in the unsatisfiable core [2021-05-02 18:23:23,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:25,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:25,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:25,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:25,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:25,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:25,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944880427] [2021-05-02 18:23:25,260 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:25,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088572830] [2021-05-02 18:23:25,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088572830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:25,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:25,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2021-05-02 18:23:25,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354567586] [2021-05-02 18:23:25,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 18:23:25,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:25,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 18:23:25,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 18:23:25,262 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) [2021-05-02 18:23:26,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:26,759 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-02 18:23:26,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 18:23:26,760 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 [2021-05-02 18:23:26,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:26,760 INFO L225 Difference]: With dead ends: 76 [2021-05-02 18:23:26,760 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 18:23:26,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1761.3ms TimeCoverageRelationStatistics Valid=134, Invalid=4156, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 18:23:26,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 18:23:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 18:23:26,762 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) [2021-05-02 18:23:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-02 18:23:26,762 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-05-02 18:23:26,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:26,762 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-02 18:23:26,762 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) [2021-05-02 18:23:26,762 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-02 18:23:26,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 18:23:26,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:26,763 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:26,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:23:26,964 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:26,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:26,964 INFO L82 PathProgramCache]: Analyzing trace with hash 888116930, now seen corresponding path program 30 times [2021-05-02 18:23:26,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:26,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895976999] [2021-05-02 18:23:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:26,972 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:26,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986030376] [2021-05-02 18:23:26,972 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 [2021-05-02 18:23:27,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 18:23:27,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:27,061 WARN L261 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 131 conjunts are in the unsatisfiable core [2021-05-02 18:23:27,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:29,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:29,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:29,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:29,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:29,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:29,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895976999] [2021-05-02 18:23:29,188 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:29,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986030376] [2021-05-02 18:23:29,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986030376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:29,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:29,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2021-05-02 18:23:29,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072500213] [2021-05-02 18:23:29,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 18:23:29,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:29,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 18:23:29,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=4160, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 18:23:29,190 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) [2021-05-02 18:23:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:30,685 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-02 18:23:30,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 18:23:30,685 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 [2021-05-02 18:23:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:30,688 INFO L225 Difference]: With dead ends: 78 [2021-05-02 18:23:30,688 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 18:23:30,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2059.1ms TimeCoverageRelationStatistics Valid=138, Invalid=4418, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 18:23:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 18:23:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-02 18:23:30,706 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) [2021-05-02 18:23:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-02 18:23:30,707 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-05-02 18:23:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:30,707 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-02 18:23:30,707 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) [2021-05-02 18:23:30,707 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-02 18:23:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 18:23:30,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:30,707 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:30,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:23:30,908 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:30,908 INFO L82 PathProgramCache]: Analyzing trace with hash -306726624, now seen corresponding path program 31 times [2021-05-02 18:23:30,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:30,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788605591] [2021-05-02 18:23:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:30,914 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:30,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892813476] [2021-05-02 18:23:30,914 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 [2021-05-02 18:23:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:23:30,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 135 conjunts are in the unsatisfiable core [2021-05-02 18:23:30,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:33,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:33,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:33,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:33,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:33,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:33,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788605591] [2021-05-02 18:23:33,342 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:33,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892813476] [2021-05-02 18:23:33,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892813476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:33,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:33,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2021-05-02 18:23:33,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929376389] [2021-05-02 18:23:33,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 18:23:33,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:33,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 18:23:33,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=4422, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 18:23:33,343 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) [2021-05-02 18:23:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:35,120 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-02 18:23:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 18:23:35,121 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 [2021-05-02 18:23:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:35,121 INFO L225 Difference]: With dead ends: 80 [2021-05-02 18:23:35,121 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 18:23:35,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2294.1ms TimeCoverageRelationStatistics Valid=142, Invalid=4688, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 18:23:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 18:23:35,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 18:23:35,122 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) [2021-05-02 18:23:35,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-02 18:23:35,123 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-05-02 18:23:35,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:35,123 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-02 18:23:35,123 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) [2021-05-02 18:23:35,123 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-02 18:23:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 18:23:35,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:35,123 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:35,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-02 18:23:35,324 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:35,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:35,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1795113986, now seen corresponding path program 32 times [2021-05-02 18:23:35,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:35,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540215264] [2021-05-02 18:23:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:35,330 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:35,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58616368] [2021-05-02 18:23:35,330 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 [2021-05-02 18:23:35,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:23:35,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:35,453 WARN L261 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 139 conjunts are in the unsatisfiable core [2021-05-02 18:23:35,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:37,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:37,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:37,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:37,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:38,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:38,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540215264] [2021-05-02 18:23:38,006 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:38,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58616368] [2021-05-02 18:23:38,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58616368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:38,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:38,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2021-05-02 18:23:38,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898289390] [2021-05-02 18:23:38,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 18:23:38,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:38,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 18:23:38,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4692, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 18:23:38,007 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) [2021-05-02 18:23:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:39,922 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-02 18:23:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 18:23:39,922 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 [2021-05-02 18:23:39,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:39,923 INFO L225 Difference]: With dead ends: 82 [2021-05-02 18:23:39,923 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 18:23:39,923 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2502.6ms TimeCoverageRelationStatistics Valid=146, Invalid=4966, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 18:23:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 18:23:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 18:23:39,924 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) [2021-05-02 18:23:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-02 18:23:39,925 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-05-02 18:23:39,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:39,925 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-02 18:23:39,925 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) [2021-05-02 18:23:39,925 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-02 18:23:39,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 18:23:39,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:39,925 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:40,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:23:40,126 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:40,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:40,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1911259300, now seen corresponding path program 33 times [2021-05-02 18:23:40,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:40,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679990029] [2021-05-02 18:23:40,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:40,132 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:40,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381263710] [2021-05-02 18:23:40,132 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 [2021-05-02 18:23:40,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-05-02 18:23:40,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:40,208 WARN L261 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 143 conjunts are in the unsatisfiable core [2021-05-02 18:23:40,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:42,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:42,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:42,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:42,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:42,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:42,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679990029] [2021-05-02 18:23:42,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:42,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381263710] [2021-05-02 18:23:42,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381263710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:42,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:42,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2021-05-02 18:23:42,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863793003] [2021-05-02 18:23:42,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 18:23:42,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:42,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 18:23:42,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4970, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 18:23:42,942 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) [2021-05-02 18:23:45,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:45,029 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-02 18:23:45,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 18:23:45,030 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 [2021-05-02 18:23:45,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:45,030 INFO L225 Difference]: With dead ends: 84 [2021-05-02 18:23:45,030 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 18:23:45,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2668.7ms TimeCoverageRelationStatistics Valid=150, Invalid=5252, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 18:23:45,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 18:23:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 18:23:45,031 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) [2021-05-02 18:23:45,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-02 18:23:45,032 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-05-02 18:23:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:45,032 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-02 18:23:45,032 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) [2021-05-02 18:23:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-02 18:23:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 18:23:45,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:45,032 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:45,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-02 18:23:45,233 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1857756358, now seen corresponding path program 34 times [2021-05-02 18:23:45,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:45,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982815179] [2021-05-02 18:23:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:45,239 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:45,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150518424] [2021-05-02 18:23:45,239 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 [2021-05-02 18:23:45,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:23:45,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:45,301 WARN L261 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 147 conjunts are in the unsatisfiable core [2021-05-02 18:23:45,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:47,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:47,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:47,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:47,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:48,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:48,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982815179] [2021-05-02 18:23:48,140 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:48,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150518424] [2021-05-02 18:23:48,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150518424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:48,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:48,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2021-05-02 18:23:48,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152923247] [2021-05-02 18:23:48,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 18:23:48,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:48,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 18:23:48,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=5256, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 18:23:48,141 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) [2021-05-02 18:23:50,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:50,312 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-02 18:23:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 18:23:50,313 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 [2021-05-02 18:23:50,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:50,313 INFO L225 Difference]: With dead ends: 86 [2021-05-02 18:23:50,313 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 18:23:50,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2779.1ms TimeCoverageRelationStatistics Valid=154, Invalid=5546, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 18:23:50,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 18:23:50,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-02 18:23:50,315 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) [2021-05-02 18:23:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-02 18:23:50,315 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-05-02 18:23:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:50,315 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-02 18:23:50,315 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) [2021-05-02 18:23:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-02 18:23:50,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 18:23:50,316 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:50,316 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:50,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:23:50,517 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:50,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:50,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1981036648, now seen corresponding path program 35 times [2021-05-02 18:23:50,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:50,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826067777] [2021-05-02 18:23:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:50,523 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:50,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669033554] [2021-05-02 18:23:50,523 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 [2021-05-02 18:23:50,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-05-02 18:23:50,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:50,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 151 conjunts are in the unsatisfiable core [2021-05-02 18:23:50,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:53,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:53,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:53,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:53,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:54,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:54,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826067777] [2021-05-02 18:23:54,045 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:54,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669033554] [2021-05-02 18:23:54,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669033554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:54,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:54,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2021-05-02 18:23:54,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196290175] [2021-05-02 18:23:54,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 18:23:54,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:54,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 18:23:54,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=5550, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 18:23:54,046 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) [2021-05-02 18:23:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:56,420 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-02 18:23:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 18:23:56,421 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 [2021-05-02 18:23:56,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:56,421 INFO L225 Difference]: With dead ends: 88 [2021-05-02 18:23:56,421 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 18:23:56,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3303.0ms TimeCoverageRelationStatistics Valid=158, Invalid=5848, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 18:23:56,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 18:23:56,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-02 18:23:56,423 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) [2021-05-02 18:23:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-02 18:23:56,423 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-05-02 18:23:56,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:56,423 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-02 18:23:56,424 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) [2021-05-02 18:23:56,424 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-02 18:23:56,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 18:23:56,424 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:56,424 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:56,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:23:56,644 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:56,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:56,644 INFO L82 PathProgramCache]: Analyzing trace with hash -194311050, now seen corresponding path program 36 times [2021-05-02 18:23:56,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:56,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405998369] [2021-05-02 18:23:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:56,651 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:23:56,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020058352] [2021-05-02 18:23:56,651 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 [2021-05-02 18:23:56,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-02 18:23:56,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:56,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 158 conjunts are in the unsatisfiable core [2021-05-02 18:23:56,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:56,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:56,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:56,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:56,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:56,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:56,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:56,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:56,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:56,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:56,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:56,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:59,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:59,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:59,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:59,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:59,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:59,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405998369] [2021-05-02 18:23:59,337 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:23:59,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020058352] [2021-05-02 18:23:59,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020058352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:59,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:23:59,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2021-05-02 18:23:59,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436581303] [2021-05-02 18:23:59,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 18:23:59,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 18:23:59,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 18:23:59,339 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 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) [2021-05-02 18:24:05,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:24:05,624 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-02 18:24:05,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 18:24:05,625 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 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 [2021-05-02 18:24:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:24:05,626 INFO L225 Difference]: With dead ends: 90 [2021-05-02 18:24:05,626 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 18:24:05,626 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 6427.5ms TimeCoverageRelationStatistics Valid=466, Invalid=23404, Unknown=0, NotChecked=0, Total=23870 [2021-05-02 18:24:05,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 18:24:05,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-02 18:24:05,628 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) [2021-05-02 18:24:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-02 18:24:05,628 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-05-02 18:24:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:24:05,628 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-02 18:24:05,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 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) [2021-05-02 18:24:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-02 18:24:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 18:24:05,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:24:05,629 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:24:05,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-05-02 18:24:05,837 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:24:05,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:24:05,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1137929772, now seen corresponding path program 37 times [2021-05-02 18:24:05,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:24:05,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102317271] [2021-05-02 18:24:05,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:24:05,843 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:24:05,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073280685] [2021-05-02 18:24:05,843 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 [2021-05-02 18:24:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:24:05,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 159 conjunts are in the unsatisfiable core [2021-05-02 18:24:05,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:24:09,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:09,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:09,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:09,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:24:09,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:24:09,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102317271] [2021-05-02 18:24:09,319 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:24:09,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073280685] [2021-05-02 18:24:09,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073280685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:24:09,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:24:09,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2021-05-02 18:24:09,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022205358] [2021-05-02 18:24:09,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 18:24:09,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:24:09,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 18:24:09,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=6162, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 18:24:09,321 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) [2021-05-02 18:24:11,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:24:11,967 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-02 18:24:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 18:24:11,968 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 [2021-05-02 18:24:11,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:24:11,968 INFO L225 Difference]: With dead ends: 92 [2021-05-02 18:24:11,968 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 18:24:11,968 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3356.2ms TimeCoverageRelationStatistics Valid=166, Invalid=6476, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 18:24:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 18:24:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-02 18:24:11,970 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) [2021-05-02 18:24:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-02 18:24:11,970 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-05-02 18:24:11,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:24:11,970 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-02 18:24:11,970 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) [2021-05-02 18:24:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-02 18:24:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 18:24:11,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:24:11,971 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:24:12,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:24:12,171 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:24:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:24:12,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1717422158, now seen corresponding path program 38 times [2021-05-02 18:24:12,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:24:12,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437207300] [2021-05-02 18:24:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:24:12,177 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:24:12,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696877548] [2021-05-02 18:24:12,178 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 [2021-05-02 18:24:12,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:24:12,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:24:12,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 163 conjunts are in the unsatisfiable core [2021-05-02 18:24:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:24:15,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:15,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:15,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:15,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:24:15,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:24:15,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437207300] [2021-05-02 18:24:15,750 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:24:15,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696877548] [2021-05-02 18:24:15,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696877548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:24:15,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:24:15,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2021-05-02 18:24:15,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857971263] [2021-05-02 18:24:15,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 18:24:15,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:24:15,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 18:24:15,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=6480, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 18:24:15,752 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) [2021-05-02 18:24:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:24:18,528 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-02 18:24:18,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 18:24:18,529 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 [2021-05-02 18:24:18,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:24:18,529 INFO L225 Difference]: With dead ends: 94 [2021-05-02 18:24:18,530 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 18:24:18,530 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3410.4ms TimeCoverageRelationStatistics Valid=170, Invalid=6802, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 18:24:18,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 18:24:18,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-05-02 18:24:18,531 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) [2021-05-02 18:24:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-02 18:24:18,531 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-05-02 18:24:18,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:24:18,532 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-02 18:24:18,532 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) [2021-05-02 18:24:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-02 18:24:18,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 18:24:18,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:24:18,532 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:24:18,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-02 18:24:18,733 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:24:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:24:18,733 INFO L82 PathProgramCache]: Analyzing trace with hash -263856624, now seen corresponding path program 39 times [2021-05-02 18:24:18,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:24:18,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348947284] [2021-05-02 18:24:18,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:24:18,746 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:24:18,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664729103] [2021-05-02 18:24:18,747 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 [2021-05-02 18:24:18,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-05-02 18:24:18,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:24:18,853 WARN L261 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 167 conjunts are in the unsatisfiable core [2021-05-02 18:24:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:24:22,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:22,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:22,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:22,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:24:22,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:24:22,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348947284] [2021-05-02 18:24:22,517 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:24:22,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664729103] [2021-05-02 18:24:22,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664729103] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:24:22,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:24:22,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2021-05-02 18:24:22,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144142175] [2021-05-02 18:24:22,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 18:24:22,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:24:22,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 18:24:22,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=6806, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 18:24:22,518 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) [2021-05-02 18:24:25,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:24:25,426 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-02 18:24:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 18:24:25,431 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 [2021-05-02 18:24:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:24:25,432 INFO L225 Difference]: With dead ends: 96 [2021-05-02 18:24:25,432 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 18:24:25,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3558.9ms TimeCoverageRelationStatistics Valid=174, Invalid=7136, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 18:24:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 18:24:25,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 18:24:25,433 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) [2021-05-02 18:24:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-02 18:24:25,434 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-05-02 18:24:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:24:25,434 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-02 18:24:25,434 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) [2021-05-02 18:24:25,434 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-02 18:24:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 18:24:25,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:24:25,434 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:24:25,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:24:25,635 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:24:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:24:25,635 INFO L82 PathProgramCache]: Analyzing trace with hash 748250350, now seen corresponding path program 40 times [2021-05-02 18:24:25,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:24:25,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910388622] [2021-05-02 18:24:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:24:25,642 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:24:25,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63869258] [2021-05-02 18:24:25,642 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 [2021-05-02 18:24:25,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:24:25,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:24:25,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 171 conjunts are in the unsatisfiable core [2021-05-02 18:24:25,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:24:29,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:29,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:29,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:29,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:24:29,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:24:29,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910388622] [2021-05-02 18:24:29,550 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:24:29,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63869258] [2021-05-02 18:24:29,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63869258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:24:29,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:24:29,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2021-05-02 18:24:29,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234960420] [2021-05-02 18:24:29,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 18:24:29,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:24:29,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 18:24:29,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=7140, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 18:24:29,552 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) [2021-05-02 18:24:32,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:24:32,367 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-02 18:24:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 18:24:32,367 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 [2021-05-02 18:24:32,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:24:32,368 INFO L225 Difference]: With dead ends: 98 [2021-05-02 18:24:32,368 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 18:24:32,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3804.3ms TimeCoverageRelationStatistics Valid=178, Invalid=7478, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 18:24:32,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 18:24:32,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 18:24:32,370 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) [2021-05-02 18:24:32,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-02 18:24:32,370 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-05-02 18:24:32,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:24:32,370 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-02 18:24:32,370 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) [2021-05-02 18:24:32,370 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-02 18:24:32,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 18:24:32,371 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:24:32,371 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:24:32,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:24:32,581 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:24:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:24:32,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1574523828, now seen corresponding path program 41 times [2021-05-02 18:24:32,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:24:32,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563923611] [2021-05-02 18:24:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:24:32,587 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:24:32,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535688390] [2021-05-02 18:24:32,587 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 [2021-05-02 18:24:32,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-05-02 18:24:32,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:24:32,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 175 conjunts are in the unsatisfiable core [2021-05-02 18:24:32,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:24:36,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:37,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:37,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:37,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:24:37,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:24:37,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563923611] [2021-05-02 18:24:37,268 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:24:37,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535688390] [2021-05-02 18:24:37,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535688390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:24:37,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:24:37,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2021-05-02 18:24:37,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388008698] [2021-05-02 18:24:37,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 18:24:37,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:24:37,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 18:24:37,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=7482, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 18:24:37,270 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) [2021-05-02 18:24:40,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:24:40,678 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-02 18:24:40,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 18:24:40,679 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 [2021-05-02 18:24:40,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:24:40,679 INFO L225 Difference]: With dead ends: 100 [2021-05-02 18:24:40,679 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 18:24:40,680 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4533.3ms TimeCoverageRelationStatistics Valid=182, Invalid=7828, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 18:24:40,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 18:24:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-05-02 18:24:40,682 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) [2021-05-02 18:24:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-02 18:24:40,683 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-05-02 18:24:40,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:24:40,683 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-02 18:24:40,683 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) [2021-05-02 18:24:40,683 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-02 18:24:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 18:24:40,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:24:40,683 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:24:40,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:24:40,901 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:24:40,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:24:40,901 INFO L82 PathProgramCache]: Analyzing trace with hash -377514966, now seen corresponding path program 42 times [2021-05-02 18:24:40,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:24:40,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584351396] [2021-05-02 18:24:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:24:40,907 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:24:40,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215434530] [2021-05-02 18:24:40,907 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 [2021-05-02 18:24:40,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-02 18:24:40,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:24:41,001 WARN L261 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 179 conjunts are in the unsatisfiable core [2021-05-02 18:24:41,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:24:45,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:46,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:46,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:46,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:24:46,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:24:46,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584351396] [2021-05-02 18:24:46,400 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:24:46,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215434530] [2021-05-02 18:24:46,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215434530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:24:46,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:24:46,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2021-05-02 18:24:46,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403497545] [2021-05-02 18:24:46,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 18:24:46,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:24:46,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 18:24:46,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=7832, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 18:24:46,402 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) [2021-05-02 18:24:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:24:50,132 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-02 18:24:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 18:24:50,133 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 [2021-05-02 18:24:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:24:50,133 INFO L225 Difference]: With dead ends: 102 [2021-05-02 18:24:50,133 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 18:24:50,134 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5294.4ms TimeCoverageRelationStatistics Valid=186, Invalid=8186, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 18:24:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 18:24:50,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-02 18:24:50,135 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) [2021-05-02 18:24:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-02 18:24:50,135 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-05-02 18:24:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:24:50,136 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-02 18:24:50,136 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) [2021-05-02 18:24:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-02 18:24:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 18:24:50,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:24:50,136 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:24:50,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:24:50,353 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:24:50,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:24:50,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1103233912, now seen corresponding path program 43 times [2021-05-02 18:24:50,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:24:50,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724806610] [2021-05-02 18:24:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:24:50,359 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:24:50,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211124227] [2021-05-02 18:24:50,359 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 [2021-05-02 18:24:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:24:50,454 WARN L261 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 183 conjunts are in the unsatisfiable core [2021-05-02 18:24:50,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:24:55,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:55,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:55,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:55,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:24:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:24:56,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:24:56,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724806610] [2021-05-02 18:24:56,126 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:24:56,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211124227] [2021-05-02 18:24:56,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211124227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:24:56,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:24:56,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2021-05-02 18:24:56,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784716348] [2021-05-02 18:24:56,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 18:24:56,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:24:56,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 18:24:56,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=8190, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 18:24:56,127 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) [2021-05-02 18:25:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:25:00,183 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-02 18:25:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 18:25:00,183 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 [2021-05-02 18:25:00,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:25:00,184 INFO L225 Difference]: With dead ends: 104 [2021-05-02 18:25:00,184 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 18:25:00,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5622.8ms TimeCoverageRelationStatistics Valid=190, Invalid=8552, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 18:25:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 18:25:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-02 18:25:00,186 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) [2021-05-02 18:25:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-02 18:25:00,186 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-05-02 18:25:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:25:00,186 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-02 18:25:00,186 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) [2021-05-02 18:25:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-02 18:25:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 18:25:00,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:25:00,187 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:25:00,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-05-02 18:25:00,387 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:25:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:25:00,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1560528230, now seen corresponding path program 44 times [2021-05-02 18:25:00,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:25:00,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782222850] [2021-05-02 18:25:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:25:00,397 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:25:00,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810720481] [2021-05-02 18:25:00,398 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 [2021-05-02 18:25:00,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:25:00,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:25:00,530 WARN L261 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 188 conjunts are in the unsatisfiable core [2021-05-02 18:25:00,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:25:05,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:05,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:05,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:05,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:25:06,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:25:06,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782222850] [2021-05-02 18:25:06,117 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:25:06,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810720481] [2021-05-02 18:25:06,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810720481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:25:06,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:25:06,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2021-05-02 18:25:06,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216425624] [2021-05-02 18:25:06,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 18:25:06,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:25:06,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 18:25:06,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=8556, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 18:25:06,119 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) [2021-05-02 18:25:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:25:10,520 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-02 18:25:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 18:25:10,520 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 [2021-05-02 18:25:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:25:10,521 INFO L225 Difference]: With dead ends: 106 [2021-05-02 18:25:10,521 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 18:25:10,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5577.1ms TimeCoverageRelationStatistics Valid=194, Invalid=8926, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 18:25:10,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 18:25:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 18:25:10,523 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) [2021-05-02 18:25:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-02 18:25:10,523 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-05-02 18:25:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:25:10,523 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-02 18:25:10,523 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) [2021-05-02 18:25:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-02 18:25:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 18:25:10,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:25:10,524 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:25:10,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-02 18:25:10,724 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:25:10,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:25:10,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1635438276, now seen corresponding path program 45 times [2021-05-02 18:25:10,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:25:10,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249059234] [2021-05-02 18:25:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:25:10,731 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:25:10,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206075644] [2021-05-02 18:25:10,731 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 [2021-05-02 18:25:10,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-05-02 18:25:10,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:25:10,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 191 conjunts are in the unsatisfiable core [2021-05-02 18:25:10,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:25:16,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:17,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:17,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:17,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:25:17,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:25:17,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249059234] [2021-05-02 18:25:17,458 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:25:17,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206075644] [2021-05-02 18:25:17,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206075644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:25:17,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:25:17,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2021-05-02 18:25:17,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310179783] [2021-05-02 18:25:17,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 18:25:17,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:25:17,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 18:25:17,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=8930, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 18:25:17,460 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) [2021-05-02 18:25:22,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:25:22,417 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-02 18:25:22,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 18:25:22,418 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 [2021-05-02 18:25:22,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:25:22,418 INFO L225 Difference]: With dead ends: 108 [2021-05-02 18:25:22,418 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 18:25:22,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6552.8ms TimeCoverageRelationStatistics Valid=198, Invalid=9308, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 18:25:22,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 18:25:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-05-02 18:25:22,420 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) [2021-05-02 18:25:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-02 18:25:22,420 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-05-02 18:25:22,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:25:22,420 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-02 18:25:22,420 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) [2021-05-02 18:25:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-02 18:25:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 18:25:22,421 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:25:22,421 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:25:22,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:25:22,629 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:25:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:25:22,629 INFO L82 PathProgramCache]: Analyzing trace with hash 609548450, now seen corresponding path program 46 times [2021-05-02 18:25:22,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:25:22,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822678790] [2021-05-02 18:25:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:25:22,635 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:25:22,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262256885] [2021-05-02 18:25:22,635 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 [2021-05-02 18:25:22,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:25:22,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:25:22,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 195 conjunts are in the unsatisfiable core [2021-05-02 18:25:22,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:25:29,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:29,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:29,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:29,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:25:29,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:25:29,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822678790] [2021-05-02 18:25:29,546 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:25:29,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262256885] [2021-05-02 18:25:29,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262256885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:25:29,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:25:29,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2021-05-02 18:25:29,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695313364] [2021-05-02 18:25:29,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 18:25:29,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:25:29,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 18:25:29,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=9312, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 18:25:29,547 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) [2021-05-02 18:25:34,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:25:34,723 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-02 18:25:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 18:25:34,724 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 [2021-05-02 18:25:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:25:34,725 INFO L225 Difference]: With dead ends: 110 [2021-05-02 18:25:34,725 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 18:25:34,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6794.1ms TimeCoverageRelationStatistics Valid=202, Invalid=9698, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 18:25:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 18:25:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-05-02 18:25:34,727 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) [2021-05-02 18:25:34,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-05-02 18:25:34,727 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-05-02 18:25:34,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:25:34,727 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-05-02 18:25:34,727 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) [2021-05-02 18:25:34,727 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-05-02 18:25:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 18:25:34,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:25:34,728 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:25:34,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:25:34,937 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:25:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:25:34,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1723063552, now seen corresponding path program 47 times [2021-05-02 18:25:34,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:25:34,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166504114] [2021-05-02 18:25:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:25:34,943 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:25:34,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003090584] [2021-05-02 18:25:34,944 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 [2021-05-02 18:25:35,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-05-02 18:25:35,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:25:35,026 WARN L261 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 199 conjunts are in the unsatisfiable core [2021-05-02 18:25:35,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:25:42,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:42,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:42,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:42,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:25:42,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:25:42,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166504114] [2021-05-02 18:25:42,718 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:25:42,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003090584] [2021-05-02 18:25:42,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003090584] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:25:42,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:25:42,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2021-05-02 18:25:42,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848845856] [2021-05-02 18:25:42,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 18:25:42,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:25:42,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 18:25:42,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=9702, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 18:25:42,719 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) [2021-05-02 18:25:48,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:25:48,097 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-02 18:25:48,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-02 18:25:48,098 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 [2021-05-02 18:25:48,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:25:48,099 INFO L225 Difference]: With dead ends: 112 [2021-05-02 18:25:48,099 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 18:25:48,099 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7625.6ms TimeCoverageRelationStatistics Valid=206, Invalid=10096, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 18:25:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 18:25:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 18:25:48,101 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) [2021-05-02 18:25:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-05-02 18:25:48,101 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-05-02 18:25:48,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:25:48,101 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-05-02 18:25:48,101 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) [2021-05-02 18:25:48,101 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-05-02 18:25:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 18:25:48,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:25:48,102 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:25:48,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:25:48,313 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:25:48,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:25:48,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1390268962, now seen corresponding path program 48 times [2021-05-02 18:25:48,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:25:48,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715176892] [2021-05-02 18:25:48,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:25:48,319 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:25:48,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774161647] [2021-05-02 18:25:48,320 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 [2021-05-02 18:25:48,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-05-02 18:25:48,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:25:48,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 203 conjunts are in the unsatisfiable core [2021-05-02 18:25:48,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:25:57,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:57,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:57,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:57,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:25:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:25:58,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:25:58,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715176892] [2021-05-02 18:25:58,040 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:25:58,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774161647] [2021-05-02 18:25:58,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774161647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:25:58,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:25:58,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2021-05-02 18:25:58,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449034608] [2021-05-02 18:25:58,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 18:25:58,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:25:58,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 18:25:58,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=10100, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 18:25:58,042 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) [2021-05-02 18:26:04,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:26:04,119 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-02 18:26:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 18:26:04,120 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 [2021-05-02 18:26:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:26:04,121 INFO L225 Difference]: With dead ends: 114 [2021-05-02 18:26:04,121 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 18:26:04,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 9585.6ms TimeCoverageRelationStatistics Valid=210, Invalid=10502, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 18:26:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 18:26:04,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 18:26:04,122 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) [2021-05-02 18:26:04,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-05-02 18:26:04,123 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-05-02 18:26:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:26:04,123 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-05-02 18:26:04,123 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) [2021-05-02 18:26:04,123 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-05-02 18:26:04,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 18:26:04,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:26:04,124 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:26:04,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-02 18:26:04,324 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:26:04,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:26:04,324 INFO L82 PathProgramCache]: Analyzing trace with hash 597752124, now seen corresponding path program 49 times [2021-05-02 18:26:04,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:26:04,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11740850] [2021-05-02 18:26:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:26:04,330 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:26:04,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468375512] [2021-05-02 18:26:04,330 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 [2021-05-02 18:26:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:26:04,412 WARN L261 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 207 conjunts are in the unsatisfiable core [2021-05-02 18:26:04,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:26:15,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:26:15,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:26:15,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:26:15,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:26:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:26:15,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:26:15,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11740850] [2021-05-02 18:26:15,740 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:26:15,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468375512] [2021-05-02 18:26:15,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468375512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:26:15,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:26:15,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2021-05-02 18:26:15,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322392865] [2021-05-02 18:26:15,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 18:26:15,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:26:15,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 18:26:15,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=10506, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 18:26:15,742 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) [2021-05-02 18:26:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:26:23,114 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-02 18:26:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-02 18:26:23,115 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 [2021-05-02 18:26:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:26:23,115 INFO L225 Difference]: With dead ends: 116 [2021-05-02 18:26:23,116 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 18:26:23,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 11245.9ms TimeCoverageRelationStatistics Valid=214, Invalid=10916, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 18:26:23,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 18:26:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-05-02 18:26:23,117 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) [2021-05-02 18:26:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-05-02 18:26:23,118 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-05-02 18:26:23,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:26:23,118 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-05-02 18:26:23,118 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) [2021-05-02 18:26:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-05-02 18:26:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 18:26:23,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:26:23,119 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:26:23,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:26:23,341 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:26:23,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:26:23,341 INFO L82 PathProgramCache]: Analyzing trace with hash -174430950, now seen corresponding path program 50 times [2021-05-02 18:26:23,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:26:23,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269051202] [2021-05-02 18:26:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:26:23,347 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:26:23,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298201201] [2021-05-02 18:26:23,347 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 [2021-05-02 18:26:23,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:26:23,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:26:23,469 WARN L261 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 211 conjunts are in the unsatisfiable core [2021-05-02 18:26:23,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:26:30,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:26:30,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:26:30,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:26:30,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:26:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:26:30,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:26:30,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269051202] [2021-05-02 18:26:30,558 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:26:30,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298201201] [2021-05-02 18:26:30,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298201201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:26:30,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:26:30,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2021-05-02 18:26:30,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087944610] [2021-05-02 18:26:30,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 18:26:30,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:26:30,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 18:26:30,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=10920, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 18:26:30,560 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) [2021-05-02 18:26:36,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:26:36,366 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-02 18:26:36,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-02 18:26:36,367 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 [2021-05-02 18:26:36,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:26:36,367 INFO L225 Difference]: With dead ends: 118 [2021-05-02 18:26:36,368 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 18:26:36,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7033.1ms TimeCoverageRelationStatistics Valid=218, Invalid=11338, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 18:26:36,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 18:26:36,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-05-02 18:26:36,369 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) [2021-05-02 18:26:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-05-02 18:26:36,370 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-05-02 18:26:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:26:36,370 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-05-02 18:26:36,370 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) [2021-05-02 18:26:36,370 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-05-02 18:26:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 18:26:36,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:26:36,371 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:26:36,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-02 18:26:36,581 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:26:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:26:36,581 INFO L82 PathProgramCache]: Analyzing trace with hash 786977144, now seen corresponding path program 51 times [2021-05-02 18:26:36,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:26:36,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680679003] [2021-05-02 18:26:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:26:36,587 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:26:36,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380591404] [2021-05-02 18:26:36,587 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 [2021-05-02 18:26:36,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-05-02 18:26:36,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:26:36,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 216 conjunts are in the unsatisfiable core [2021-05-02 18:26:36,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:26:44,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:26:44,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:26:44,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:26:44,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:26:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:26:45,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:26:45,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680679003] [2021-05-02 18:26:45,195 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:26:45,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380591404] [2021-05-02 18:26:45,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380591404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:26:45,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:26:45,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2021-05-02 18:26:45,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028282170] [2021-05-02 18:26:45,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-02 18:26:45,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:26:45,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-02 18:26:45,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=11342, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 18:26:45,196 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) [2021-05-02 18:26:52,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:26:52,669 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-02 18:26:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-02 18:26:52,669 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 [2021-05-02 18:26:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:26:52,670 INFO L225 Difference]: With dead ends: 120 [2021-05-02 18:26:52,670 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 18:26:52,670 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8407.5ms TimeCoverageRelationStatistics Valid=222, Invalid=11768, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 18:26:52,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 18:26:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-02 18:26:52,672 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) [2021-05-02 18:26:52,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-05-02 18:26:52,672 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-05-02 18:26:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:26:52,672 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-05-02 18:26:52,672 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) [2021-05-02 18:26:52,672 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-05-02 18:26:52,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 18:26:52,673 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:26:52,673 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:26:52,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-02 18:26:52,873 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:26:52,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:26:52,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1282186838, now seen corresponding path program 52 times [2021-05-02 18:26:52,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:26:52,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101535847] [2021-05-02 18:26:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:26:52,879 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:26:52,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060465937] [2021-05-02 18:26:52,879 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 [2021-05-02 18:26:52,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:26:52,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:26:52,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 219 conjunts are in the unsatisfiable core [2021-05-02 18:26:52,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:27:01,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:01,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:01,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:01,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:27:01,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:27:01,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101535847] [2021-05-02 18:27:01,925 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:27:01,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060465937] [2021-05-02 18:27:01,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060465937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:27:01,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:27:01,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2021-05-02 18:27:01,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722664049] [2021-05-02 18:27:01,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-02 18:27:01,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:27:01,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-02 18:27:01,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=11772, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 18:27:01,926 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) [2021-05-02 18:27:10,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:27:10,773 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-02 18:27:10,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-02 18:27:10,774 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 [2021-05-02 18:27:10,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:27:10,775 INFO L225 Difference]: With dead ends: 122 [2021-05-02 18:27:10,775 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 18:27:10,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8923.9ms TimeCoverageRelationStatistics Valid=226, Invalid=12206, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 18:27:10,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 18:27:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-02 18:27:10,777 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) [2021-05-02 18:27:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-05-02 18:27:10,777 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-05-02 18:27:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:27:10,777 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-05-02 18:27:10,777 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) [2021-05-02 18:27:10,777 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-05-02 18:27:10,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 18:27:10,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:27:10,778 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:27:10,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-05-02 18:27:10,979 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:27:10,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:27:10,979 INFO L82 PathProgramCache]: Analyzing trace with hash 437332916, now seen corresponding path program 53 times [2021-05-02 18:27:10,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:27:10,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213016802] [2021-05-02 18:27:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:27:10,985 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:27:10,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281463179] [2021-05-02 18:27:10,985 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 [2021-05-02 18:27:11,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-05-02 18:27:11,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:27:11,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 223 conjunts are in the unsatisfiable core [2021-05-02 18:27:11,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:27:18,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:19,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:19,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:19,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:27:19,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:27:19,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213016802] [2021-05-02 18:27:19,640 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:27:19,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281463179] [2021-05-02 18:27:19,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281463179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:27:19,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:27:19,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2021-05-02 18:27:19,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812345582] [2021-05-02 18:27:19,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-02 18:27:19,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:27:19,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-02 18:27:19,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=12210, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 18:27:19,641 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) [2021-05-02 18:27:26,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:27:26,474 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-05-02 18:27:26,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-02 18:27:26,475 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 [2021-05-02 18:27:26,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:27:26,475 INFO L225 Difference]: With dead ends: 124 [2021-05-02 18:27:26,475 INFO L226 Difference]: Without dead ends: 121 [2021-05-02 18:27:26,476 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8528.2ms TimeCoverageRelationStatistics Valid=230, Invalid=12652, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 18:27:26,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-02 18:27:26,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-05-02 18:27:26,477 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) [2021-05-02 18:27:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-05-02 18:27:26,477 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-05-02 18:27:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:27:26,477 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-05-02 18:27:26,478 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) [2021-05-02 18:27:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-05-02 18:27:26,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 18:27:26,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:27:26,478 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:27:26,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-02 18:27:26,679 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:27:26,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:27:26,679 INFO L82 PathProgramCache]: Analyzing trace with hash 281532818, now seen corresponding path program 54 times [2021-05-02 18:27:26,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:27:26,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372067981] [2021-05-02 18:27:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:27:26,685 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:27:26,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089653706] [2021-05-02 18:27:26,685 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 [2021-05-02 18:27:26,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-05-02 18:27:26,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:27:26,830 WARN L261 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 227 conjunts are in the unsatisfiable core [2021-05-02 18:27:26,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:27:37,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:37,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:37,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:37,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:27:38,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:27:38,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372067981] [2021-05-02 18:27:38,298 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:27:38,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089653706] [2021-05-02 18:27:38,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089653706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:27:38,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:27:38,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2021-05-02 18:27:38,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809648649] [2021-05-02 18:27:38,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-02 18:27:38,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:27:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-02 18:27:38,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=12656, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 18:27:38,299 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) [2021-05-02 18:27:45,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:27:45,818 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-05-02 18:27:45,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-02 18:27:45,819 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 [2021-05-02 18:27:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:27:45,819 INFO L225 Difference]: With dead ends: 126 [2021-05-02 18:27:45,819 INFO L226 Difference]: Without dead ends: 123 [2021-05-02 18:27:45,820 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 11452.5ms TimeCoverageRelationStatistics Valid=234, Invalid=13106, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 18:27:45,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-02 18:27:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-05-02 18:27:45,821 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) [2021-05-02 18:27:45,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-05-02 18:27:45,822 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-05-02 18:27:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:27:45,822 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-05-02 18:27:45,822 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) [2021-05-02 18:27:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-05-02 18:27:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 18:27:45,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:27:45,822 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:27:46,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:27:46,023 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:27:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:27:46,023 INFO L82 PathProgramCache]: Analyzing trace with hash 881494000, now seen corresponding path program 55 times [2021-05-02 18:27:46,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:27:46,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919996793] [2021-05-02 18:27:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:27:46,030 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:27:46,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684034501] [2021-05-02 18:27:46,030 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 [2021-05-02 18:27:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:27:46,125 WARN L261 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 231 conjunts are in the unsatisfiable core [2021-05-02 18:27:46,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:27:58,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:58,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:58,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:58,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:27:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:27:59,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:27:59,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919996793] [2021-05-02 18:27:59,032 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:27:59,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684034501] [2021-05-02 18:27:59,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684034501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:27:59,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:27:59,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2021-05-02 18:27:59,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647592979] [2021-05-02 18:27:59,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-02 18:27:59,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:27:59,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-02 18:27:59,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=13110, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 18:27:59,033 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) [2021-05-02 18:28:07,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:28:07,163 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-05-02 18:28:07,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-02 18:28:07,164 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 [2021-05-02 18:28:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:28:07,165 INFO L225 Difference]: With dead ends: 128 [2021-05-02 18:28:07,165 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 18:28:07,165 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12917.6ms TimeCoverageRelationStatistics Valid=238, Invalid=13568, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 18:28:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 18:28:07,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-02 18:28:07,167 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) [2021-05-02 18:28:07,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-05-02 18:28:07,167 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-05-02 18:28:07,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:28:07,167 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-05-02 18:28:07,167 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) [2021-05-02 18:28:07,167 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-05-02 18:28:07,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 18:28:07,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:28:07,168 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:28:07,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:28:07,377 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:28:07,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:28:07,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1918572238, now seen corresponding path program 56 times [2021-05-02 18:28:07,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:28:07,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573776513] [2021-05-02 18:28:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:28:07,383 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:28:07,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582805114] [2021-05-02 18:28:07,384 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 [2021-05-02 18:28:07,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:28:07,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:28:07,467 WARN L261 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 235 conjunts are in the unsatisfiable core [2021-05-02 18:28:07,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:28:18,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:28:19,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:28:19,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:28:19,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:28:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:28:19,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:28:19,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573776513] [2021-05-02 18:28:19,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:28:19,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582805114] [2021-05-02 18:28:19,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582805114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:28:19,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:28:19,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2021-05-02 18:28:19,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219059169] [2021-05-02 18:28:19,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-02 18:28:19,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:28:19,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-02 18:28:19,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=13572, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 18:28:19,707 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) [2021-05-02 18:28:28,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:28:28,538 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-05-02 18:28:28,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-02 18:28:28,539 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 [2021-05-02 18:28:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:28:28,539 INFO L225 Difference]: With dead ends: 130 [2021-05-02 18:28:28,539 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 18:28:28,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12254.7ms TimeCoverageRelationStatistics Valid=242, Invalid=14038, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 18:28:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 18:28:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-02 18:28:28,541 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) [2021-05-02 18:28:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-05-02 18:28:28,542 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-05-02 18:28:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:28:28,542 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-05-02 18:28:28,542 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) [2021-05-02 18:28:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-05-02 18:28:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-02 18:28:28,543 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:28:28,543 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:28:28,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:28:28,743 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:28:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:28:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2118346284, now seen corresponding path program 57 times [2021-05-02 18:28:28,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:28:28,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262507946] [2021-05-02 18:28:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:28:28,766 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:28:28,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628887484] [2021-05-02 18:28:28,767 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 [2021-05-02 18:28:28,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-05-02 18:28:28,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:28:28,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 239 conjunts are in the unsatisfiable core [2021-05-02 18:28:28,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:28:44,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:28:44,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:28:44,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:28:44,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:28:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:28:45,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:28:45,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262507946] [2021-05-02 18:28:45,207 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:28:45,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628887484] [2021-05-02 18:28:45,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628887484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:28:45,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:28:45,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2021-05-02 18:28:45,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784265119] [2021-05-02 18:28:45,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-02 18:28:45,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:28:45,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-02 18:28:45,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=14042, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 18:28:45,208 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) [2021-05-02 18:28:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:28:55,703 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-05-02 18:28:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-02 18:28:55,704 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 [2021-05-02 18:28:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:28:55,704 INFO L225 Difference]: With dead ends: 132 [2021-05-02 18:28:55,704 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 18:28:55,705 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16260.7ms TimeCoverageRelationStatistics Valid=246, Invalid=14516, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 18:28:55,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 18:28:55,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-02 18:28:55,707 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) [2021-05-02 18:28:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-05-02 18:28:55,707 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-05-02 18:28:55,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:28:55,707 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-05-02 18:28:55,707 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) [2021-05-02 18:28:55,707 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-05-02 18:28:55,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 18:28:55,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:28:55,708 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:28:55,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-02 18:28:55,917 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:28:55,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:28:55,917 INFO L82 PathProgramCache]: Analyzing trace with hash 827676170, now seen corresponding path program 58 times [2021-05-02 18:28:55,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:28:55,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003428953] [2021-05-02 18:28:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:28:55,924 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:28:55,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113985622] [2021-05-02 18:28:55,924 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 [2021-05-02 18:28:56,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:28:56,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:28:56,026 WARN L261 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 243 conjunts are in the unsatisfiable core [2021-05-02 18:28:56,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:29:07,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:07,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:07,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:07,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:29:07,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:29:07,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003428953] [2021-05-02 18:29:07,831 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:29:07,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113985622] [2021-05-02 18:29:07,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113985622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:29:07,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:29:07,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2021-05-02 18:29:07,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936271272] [2021-05-02 18:29:07,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-02 18:29:07,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:29:07,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-02 18:29:07,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=14520, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 18:29:07,833 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) [2021-05-02 18:29:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:29:20,768 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-05-02 18:29:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-02 18:29:20,770 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 [2021-05-02 18:29:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:29:20,770 INFO L225 Difference]: With dead ends: 134 [2021-05-02 18:29:20,770 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 18:29:20,771 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12063.6ms TimeCoverageRelationStatistics Valid=250, Invalid=15002, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 18:29:20,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 18:29:20,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-02 18:29:20,772 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) [2021-05-02 18:29:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-05-02 18:29:20,773 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-05-02 18:29:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:29:20,773 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-05-02 18:29:20,773 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) [2021-05-02 18:29:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-05-02 18:29:20,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 18:29:20,774 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:29:20,774 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:29:20,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:29:20,974 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:29:20,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:29:20,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1739245160, now seen corresponding path program 59 times [2021-05-02 18:29:20,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:29:20,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656914090] [2021-05-02 18:29:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:29:20,981 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:29:20,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071512037] [2021-05-02 18:29:20,981 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 [2021-05-02 18:29:21,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2021-05-02 18:29:21,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:29:21,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 247 conjunts are in the unsatisfiable core [2021-05-02 18:29:21,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:29:37,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:37,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:37,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:37,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:29:38,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:29:38,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656914090] [2021-05-02 18:29:38,688 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:29:38,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071512037] [2021-05-02 18:29:38,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071512037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:29:38,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:29:38,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2021-05-02 18:29:38,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888350861] [2021-05-02 18:29:38,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-02 18:29:38,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:29:38,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-02 18:29:38,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=15006, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 18:29:38,689 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) [2021-05-02 18:29:50,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:29:50,910 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-05-02 18:29:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-02 18:29:50,912 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 [2021-05-02 18:29:50,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:29:50,912 INFO L225 Difference]: With dead ends: 136 [2021-05-02 18:29:50,912 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 18:29:50,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17400.3ms TimeCoverageRelationStatistics Valid=254, Invalid=15496, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 18:29:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 18:29:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-05-02 18:29:50,915 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) [2021-05-02 18:29:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2021-05-02 18:29:50,915 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2021-05-02 18:29:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:29:50,915 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2021-05-02 18:29:50,915 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) [2021-05-02 18:29:50,915 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2021-05-02 18:29:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 18:29:50,916 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:29:50,916 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:29:51,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-02 18:29:51,117 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:29:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:29:51,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1583716166, now seen corresponding path program 60 times [2021-05-02 18:29:51,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:29:51,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307917195] [2021-05-02 18:29:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:29:51,125 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:29:51,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484104062] [2021-05-02 18:29:51,125 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 [2021-05-02 18:29:51,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2021-05-02 18:29:51,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:29:51,278 WARN L261 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 254 conjunts are in the unsatisfiable core [2021-05-02 18:29:51,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:29:51,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:51,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:51,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:51,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:51,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:51,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:51,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:51,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:51,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:51,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:29:51,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:30:05,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:30:05,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:30:05,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:30:05,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:30:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:30:06,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:30:06,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307917195] [2021-05-02 18:30:06,124 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:30:06,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484104062] [2021-05-02 18:30:06,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484104062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:30:06,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:30:06,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127] total 127 [2021-05-02 18:30:06,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597354245] [2021-05-02 18:30:06,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2021-05-02 18:30:06,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:30:06,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-05-02 18:30:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=15750, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 18:30:06,126 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 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) [2021-05-02 18:30:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:30:47,246 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-05-02 18:30:47,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-05-02 18:30:47,250 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 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 [2021-05-02 18:30:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:30:47,250 INFO L225 Difference]: With dead ends: 138 [2021-05-02 18:30:47,251 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 18:30:47,253 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7627 ImplicationChecksByTransitivity, 42489.2ms TimeCoverageRelationStatistics Valid=754, Invalid=61996, Unknown=0, NotChecked=0, Total=62750 [2021-05-02 18:30:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 18:30:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-02 18:30:47,254 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) [2021-05-02 18:30:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2021-05-02 18:30:47,254 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2021-05-02 18:30:47,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:30:47,254 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2021-05-02 18:30:47,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 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) [2021-05-02 18:30:47,255 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2021-05-02 18:30:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 18:30:47,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:30:47,255 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:30:47,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:30:47,465 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:30:47,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:30:47,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1850759004, now seen corresponding path program 61 times [2021-05-02 18:30:47,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:30:47,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714111108] [2021-05-02 18:30:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:30:47,472 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:30:47,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279750850] [2021-05-02 18:30:47,472 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 [2021-05-02 18:30:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:30:47,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 255 conjunts are in the unsatisfiable core [2021-05-02 18:30:47,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:31:24,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:31:25,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:31:25,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:31:25,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:31:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:31:26,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:31:26,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714111108] [2021-05-02 18:31:26,135 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:31:26,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279750850] [2021-05-02 18:31:26,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279750850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:31:26,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:31:26,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2021-05-02 18:31:26,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712497095] [2021-05-02 18:31:26,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-02 18:31:26,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:31:26,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-02 18:31:26,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=16002, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 18:31:26,137 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) [2021-05-02 18:31:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:31:44,829 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-05-02 18:31:44,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-05-02 18:31:44,830 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 [2021-05-02 18:31:44,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:31:44,831 INFO L225 Difference]: With dead ends: 140 [2021-05-02 18:31:44,831 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 18:31:44,832 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38289.3ms TimeCoverageRelationStatistics Valid=262, Invalid=16508, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 18:31:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 18:31:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-02 18:31:44,833 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) [2021-05-02 18:31:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2021-05-02 18:31:44,834 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2021-05-02 18:31:44,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:31:44,834 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2021-05-02 18:31:44,834 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) [2021-05-02 18:31:44,834 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2021-05-02 18:31:44,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-02 18:31:44,834 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:31:44,835 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:31:45,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-02 18:31:45,045 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:31:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:31:45,045 INFO L82 PathProgramCache]: Analyzing trace with hash 448453250, now seen corresponding path program 62 times [2021-05-02 18:31:45,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:31:45,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523113864] [2021-05-02 18:31:45,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:31:45,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:31:45,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776789860] [2021-05-02 18:31:45,053 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 [2021-05-02 18:31:45,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:31:45,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:31:45,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 259 conjunts are in the unsatisfiable core [2021-05-02 18:31:45,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:32:13,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:32:13,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:32:13,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:32:13,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:32:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:32:16,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:32:16,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523113864] [2021-05-02 18:32:16,027 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:32:16,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776789860] [2021-05-02 18:32:16,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776789860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:32:16,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:32:16,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2021-05-02 18:32:16,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341281016] [2021-05-02 18:32:16,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-02 18:32:16,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:32:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-02 18:32:16,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=16512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 18:32:16,029 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) [2021-05-02 18:32:40,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:32:40,258 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-05-02 18:32:40,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-02 18:32:40,260 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 [2021-05-02 18:32:40,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:32:40,261 INFO L225 Difference]: With dead ends: 142 [2021-05-02 18:32:40,261 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 18:32:40,262 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30989.8ms TimeCoverageRelationStatistics Valid=266, Invalid=17026, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 18:32:40,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 18:32:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-05-02 18:32:40,263 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) [2021-05-02 18:32:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2021-05-02 18:32:40,264 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2021-05-02 18:32:40,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:32:40,264 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2021-05-02 18:32:40,264 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) [2021-05-02 18:32:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2021-05-02 18:32:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 18:32:40,264 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:32:40,265 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:32:40,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:32:40,473 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:32:40,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:32:40,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1916728096, now seen corresponding path program 63 times [2021-05-02 18:32:40,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:32:40,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858369000] [2021-05-02 18:32:40,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:32:40,484 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:32:40,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88867382] [2021-05-02 18:32:40,485 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 [2021-05-02 18:32:40,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-05-02 18:32:40,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:32:40,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 263 conjunts are in the unsatisfiable core [2021-05-02 18:32:40,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:33:04,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:33:05,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:33:05,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:33:05,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:33:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:33:06,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:33:06,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858369000] [2021-05-02 18:33:06,693 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:33:06,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88867382] [2021-05-02 18:33:06,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88867382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:33:06,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:33:06,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132] total 132 [2021-05-02 18:33:06,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953058231] [2021-05-02 18:33:06,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-02 18:33:06,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:33:06,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-02 18:33:06,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=17030, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 18:33:06,695 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) [2021-05-02 18:33:28,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:33:28,942 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2021-05-02 18:33:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-02 18:33:28,944 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 [2021-05-02 18:33:28,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:33:28,945 INFO L225 Difference]: With dead ends: 144 [2021-05-02 18:33:28,945 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 18:33:28,946 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25913.4ms TimeCoverageRelationStatistics Valid=270, Invalid=17552, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 18:33:28,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 18:33:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-02 18:33:28,947 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) [2021-05-02 18:33:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2021-05-02 18:33:28,948 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2021-05-02 18:33:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:33:28,948 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2021-05-02 18:33:28,948 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) [2021-05-02 18:33:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2021-05-02 18:33:28,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 18:33:28,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:33:28,949 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:33:29,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-05-02 18:33:29,161 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:33:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:33:29,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1476665278, now seen corresponding path program 64 times [2021-05-02 18:33:29,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:33:29,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723539149] [2021-05-02 18:33:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:33:29,169 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:33:29,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937144222] [2021-05-02 18:33:29,169 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 [2021-05-02 18:33:29,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:33:29,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:33:29,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 267 conjunts are in the unsatisfiable core [2021-05-02 18:33:29,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:34:22,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:34:23,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:34:23,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:34:23,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:34:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:34:25,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:34:25,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723539149] [2021-05-02 18:34:25,536 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:34:25,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937144222] [2021-05-02 18:34:25,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937144222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:34:25,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:34:25,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134] total 134 [2021-05-02 18:34:25,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824046602] [2021-05-02 18:34:25,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-02 18:34:25,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:34:25,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-02 18:34:25,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=17556, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 18:34:25,538 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) [2021-05-02 18:34:51,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:34:51,819 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2021-05-02 18:34:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-02 18:34:51,827 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 [2021-05-02 18:34:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:34:51,827 INFO L225 Difference]: With dead ends: 146 [2021-05-02 18:34:51,827 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 18:34:51,828 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56237.8ms TimeCoverageRelationStatistics Valid=274, Invalid=18086, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 18:34:51,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 18:34:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-05-02 18:34:51,830 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) [2021-05-02 18:34:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2021-05-02 18:34:51,830 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2021-05-02 18:34:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:34:51,830 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2021-05-02 18:34:51,830 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) [2021-05-02 18:34:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2021-05-02 18:34:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-02 18:34:51,831 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:34:51,831 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:34:52,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-02 18:34:52,041 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:34:52,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:34:52,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1647447268, now seen corresponding path program 65 times [2021-05-02 18:34:52,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:34:52,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074043061] [2021-05-02 18:34:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:34:52,049 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:34:52,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21240676] [2021-05-02 18:34:52,049 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 [2021-05-02 18:34:52,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-05-02 18:34:52,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:34:52,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 271 conjunts are in the unsatisfiable core [2021-05-02 18:34:52,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:35:21,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:35:21,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:35:21,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:35:21,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:35:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:35:23,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:35:23,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074043061] [2021-05-02 18:35:23,031 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:35:23,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21240676] [2021-05-02 18:35:23,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21240676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:35:23,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:35:23,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136] total 136 [2021-05-02 18:35:23,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784201507] [2021-05-02 18:35:23,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-02 18:35:23,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:35:23,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-02 18:35:23,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=18090, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 18:35:23,032 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) [2021-05-02 18:35:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:35:45,787 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2021-05-02 18:35:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-05-02 18:35:45,789 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 [2021-05-02 18:35:45,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:35:45,790 INFO L225 Difference]: With dead ends: 148 [2021-05-02 18:35:45,790 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 18:35:45,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30594.0ms TimeCoverageRelationStatistics Valid=278, Invalid=18628, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 18:35:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 18:35:45,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 18:35:45,792 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) [2021-05-02 18:35:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2021-05-02 18:35:45,792 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2021-05-02 18:35:45,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:35:45,792 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2021-05-02 18:35:45,792 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) [2021-05-02 18:35:45,792 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2021-05-02 18:35:45,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 18:35:45,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:35:45,793 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:35:45,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:35:45,993 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:35:45,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:35:45,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1737464070, now seen corresponding path program 66 times [2021-05-02 18:35:45,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:35:45,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639511726] [2021-05-02 18:35:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:35:46,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:35:46,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455811953] [2021-05-02 18:35:46,008 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 [2021-05-02 18:35:47,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-05-02 18:35:47,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:35:47,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 275 conjunts are in the unsatisfiable core [2021-05-02 18:35:47,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:36:26,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:36:27,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:36:27,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:36:27,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:36:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:36:28,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:36:28,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639511726] [2021-05-02 18:36:28,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:36:28,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455811953] [2021-05-02 18:36:28,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455811953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:36:28,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:36:28,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138] total 138 [2021-05-02 18:36:28,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604870528] [2021-05-02 18:36:28,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-02 18:36:28,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:36:28,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-02 18:36:28,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=18632, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 18:36:28,835 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) [2021-05-02 18:36:56,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:36:56,362 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-05-02 18:36:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-05-02 18:36:56,367 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 [2021-05-02 18:36:56,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:36:56,367 INFO L225 Difference]: With dead ends: 150 [2021-05-02 18:36:56,367 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 18:36:56,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41594.2ms TimeCoverageRelationStatistics Valid=282, Invalid=19178, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 18:36:56,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 18:36:56,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-05-02 18:36:56,369 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) [2021-05-02 18:36:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2021-05-02 18:36:56,369 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2021-05-02 18:36:56,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:36:56,370 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2021-05-02 18:36:56,370 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) [2021-05-02 18:36:56,370 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2021-05-02 18:36:56,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 18:36:56,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:36:56,370 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:36:56,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:36:56,571 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:36:56,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:36:56,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1950702424, now seen corresponding path program 67 times [2021-05-02 18:36:56,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:36:56,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169438281] [2021-05-02 18:36:56,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:36:56,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 18:36:56,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286620379] [2021-05-02 18:36:56,592 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 [2021-05-02 18:36:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:36:56,734 WARN L261 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 279 conjunts are in the unsatisfiable core [2021-05-02 18:36:56,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:37:20,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:20,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:20,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:20,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:37:22,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:37:22,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169438281] [2021-05-02 18:37:22,299 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 18:37:22,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286620379] [2021-05-02 18:37:22,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286620379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:37:22,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:37:22,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140] total 140 [2021-05-02 18:37:22,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187776272] [2021-05-02 18:37:22,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 140 states [2021-05-02 18:37:22,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:37:22,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-05-02 18:37:22,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=19182, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 18:37:22,301 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)