/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/nla-digbench-scaling/divbin2_valuebound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:06:38,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:06:38,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:06:38,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:06:38,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:06:38,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:06:38,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:06:38,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:06:38,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:06:38,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:06:38,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:06:38,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-02 20:06:38,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:06:38,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:06:38,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:06:38,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:06:38,456 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:06:38,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:06:38,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:06:38,459 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:06:38,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:06:38,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:06:38,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:06:38,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:06:38,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:06:38,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:06:38,460 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:06:38,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:06:38,460 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:06:38,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:06:38,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:06:38,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:06:38,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:06:38,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:06:38,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:06:38,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:06:38,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:06:38,462 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:06:38,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:06:38,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:06:38,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:06:38,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:06:38,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:06:38,723 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:06:38,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound20.i [2021-05-02 20:06:38,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f41c443/8ca494a95912403e8a89a5071183b06c/FLAG9b880b680 [2021-05-02 20:06:39,087 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:06:39,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound20.i [2021-05-02 20:06:39,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f41c443/8ca494a95912403e8a89a5071183b06c/FLAG9b880b680 [2021-05-02 20:06:39,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f41c443/8ca494a95912403e8a89a5071183b06c [2021-05-02 20:06:39,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:06:39,499 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:06:39,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:06:39,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:06:39,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:06:39,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:06:39" (1/1) ... [2021-05-02 20:06:39,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f09baae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:39, skipping insertion in model container [2021-05-02 20:06:39,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:06:39" (1/1) ... [2021-05-02 20:06:39,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:06:39,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:06:39,605 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound20.i[959,972] [2021-05-02 20:06:39,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:06:39,617 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:06:39,654 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound20.i[959,972] [2021-05-02 20:06:39,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:06:39,683 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:06:39,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:39 WrapperNode [2021-05-02 20:06:39,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:06:39,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:06:39,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:06:39,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:06:39,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:39" (1/1) ... [2021-05-02 20:06:39,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:39" (1/1) ... [2021-05-02 20:06:39,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:39" (1/1) ... [2021-05-02 20:06:39,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:39" (1/1) ... [2021-05-02 20:06:39,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:39" (1/1) ... [2021-05-02 20:06:39,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:39" (1/1) ... [2021-05-02 20:06:39,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:39" (1/1) ... [2021-05-02 20:06:39,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:06:39,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:06:39,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:06:39,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:06:39,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:39" (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 20:06:39,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:06:39,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:06:39,783 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:06:39,783 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:06:39,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:06:39,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:06:39,784 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:06:39,784 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:06:39,784 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 20:06:39,784 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 20:06:39,784 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:06:39,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:06:39,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:06:39,784 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:06:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:06:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:06:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:06:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:06:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:06:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:06:39,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:06:39,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:06:40,059 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:06:40,059 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:06:40,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:06:40 BoogieIcfgContainer [2021-05-02 20:06:40,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:06:40,060 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:06:40,060 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:06:40,063 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:06:40,065 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:06:40" (1/1) ... [2021-05-02 20:06:40,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:06:40 BasicIcfg [2021-05-02 20:06:40,076 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:06:40,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:06:40,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:06:40,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:06:40,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:06:39" (1/4) ... [2021-05-02 20:06:40,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4331d337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:06:40, skipping insertion in model container [2021-05-02 20:06:40,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:06:39" (2/4) ... [2021-05-02 20:06:40,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4331d337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:06:40, skipping insertion in model container [2021-05-02 20:06:40,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:06:40" (3/4) ... [2021-05-02 20:06:40,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4331d337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:06:40, skipping insertion in model container [2021-05-02 20:06:40,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:06:40" (4/4) ... [2021-05-02 20:06:40,084 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound20.iJordan [2021-05-02 20:06:40,088 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:06:40,091 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:06:40,105 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:06:40,123 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:06:40,123 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:06:40,123 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:06:40,123 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:06:40,123 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:06:40,123 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:06:40,123 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:06:40,123 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:06:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:06:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:06:40,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:40,144 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:40,145 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:40,148 INFO L82 PathProgramCache]: Analyzing trace with hash 483266332, now seen corresponding path program 1 times [2021-05-02 20:06:40,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:40,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396938710] [2021-05-02 20:06:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:06:40,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:06:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:06:40,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:06:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:06:40,352 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 20:06:40,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:40,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396938710] [2021-05-02 20:06:40,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396938710] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:06:40,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:06:40,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:06:40,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918989419] [2021-05-02 20:06:40,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:06:40,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:40,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:06:40,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:06:40,366 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:06:40,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:40,420 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 20:06:40,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:06:40,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:06:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:40,426 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:06:40,426 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:06:40,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:06:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:06:40,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:06:40,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:06:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 20:06:40,448 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-05-02 20:06:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:40,448 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 20:06:40,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:06:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 20:06:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 20:06:40,449 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:40,449 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:40,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:06:40,449 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:40,450 INFO L82 PathProgramCache]: Analyzing trace with hash -2138426952, now seen corresponding path program 1 times [2021-05-02 20:06:40,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:40,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223786026] [2021-05-02 20:06:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:40,461 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:40,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69877656] [2021-05-02 20:06:40,461 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 20:06:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:06:40,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:06:40,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:40,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:40,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:40,724 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 20:06:40,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:40,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223786026] [2021-05-02 20:06:40,725 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:40,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69877656] [2021-05-02 20:06:40,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69877656] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:06:40,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:06:40,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:06:40,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673447599] [2021-05-02 20:06:40,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:06:40,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:40,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:06:40,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:06:40,727 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:06:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:40,815 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 20:06:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:06:40,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-05-02 20:06:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:40,816 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:06:40,816 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:06:40,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:06:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:06:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:06:40,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:06:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-02 20:06:40,821 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2021-05-02 20:06:40,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:40,821 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-02 20:06:40,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:06:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-02 20:06:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 20:06:40,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:40,822 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:41,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:06:41,040 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:41,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:41,040 INFO L82 PathProgramCache]: Analyzing trace with hash -554838191, now seen corresponding path program 1 times [2021-05-02 20:06:41,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:41,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789108149] [2021-05-02 20:06:41,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:41,049 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:41,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898580561] [2021-05-02 20:06:41,049 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 20:06:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:06:41,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:06:41,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:41,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:41,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:06:41,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:41,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789108149] [2021-05-02 20:06:41,251 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:41,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898580561] [2021-05-02 20:06:41,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898580561] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:06:41,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:06:41,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:06:41,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396002787] [2021-05-02 20:06:41,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:06:41,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:41,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:06:41,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:06:41,252 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:06:41,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:41,350 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-02 20:06:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:06:41,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-05-02 20:06:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:41,353 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:06:41,353 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:06:41,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:06:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:06:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 20:06:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:06:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-02 20:06:41,363 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-05-02 20:06:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:41,363 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-02 20:06:41,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:06:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-02 20:06:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 20:06:41,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:41,365 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:41,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:41,581 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:41,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:41,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1600606598, now seen corresponding path program 1 times [2021-05-02 20:06:41,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:41,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91143655] [2021-05-02 20:06:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:41,589 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:41,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619164520] [2021-05-02 20:06:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:06:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:06:41,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:06:41,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:06:41,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:41,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91143655] [2021-05-02 20:06:41,718 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:41,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619164520] [2021-05-02 20:06:41,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619164520] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:06:41,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:06:41,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:06:41,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801892690] [2021-05-02 20:06:41,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:06:41,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:41,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:06:41,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:06:41,720 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:06:41,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:41,730 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-02 20:06:41,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:06:41,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 20:06:41,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:41,731 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:06:41,731 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:06:41,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:06:41,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:06:41,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:06:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:06:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 20:06:41,734 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2021-05-02 20:06:41,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:41,734 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 20:06:41,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:06:41,734 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 20:06:41,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:06:41,735 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:41,735 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:41,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:41,941 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:41,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1664896543, now seen corresponding path program 1 times [2021-05-02 20:06:41,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:41,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105973000] [2021-05-02 20:06:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:41,949 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:41,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668659438] [2021-05-02 20:06:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:06:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:06:41,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 20:06:42,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:42,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:06:42,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:42,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105973000] [2021-05-02 20:06:42,158 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:42,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668659438] [2021-05-02 20:06:42,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668659438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:06:42,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:06:42,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:06:42,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968684961] [2021-05-02 20:06:42,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:06:42,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:42,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:06:42,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:06:42,160 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:06:42,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:42,287 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-05-02 20:06:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:06:42,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:06:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:42,288 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:06:42,288 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 20:06:42,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:06:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 20:06:42,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 20:06:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:06:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 20:06:42,300 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 29 [2021-05-02 20:06:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:42,300 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 20:06:42,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:06:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 20:06:42,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 20:06:42,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:42,303 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:42,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:42,528 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:42,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:42,529 INFO L82 PathProgramCache]: Analyzing trace with hash -976975752, now seen corresponding path program 2 times [2021-05-02 20:06:42,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:42,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927555694] [2021-05-02 20:06:42,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:42,536 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:42,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964006196] [2021-05-02 20:06:42,536 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 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 20:06:42,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:06:42,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:06:42,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:06:42,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:42,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:06:42,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:42,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927555694] [2021-05-02 20:06:42,744 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:42,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964006196] [2021-05-02 20:06:42,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964006196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:06:42,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:06:42,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:06:42,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000632550] [2021-05-02 20:06:42,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:06:42,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:42,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:06:42,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:06:42,745 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:06:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:42,934 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2021-05-02 20:06:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:06:42,935 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-02 20:06:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:42,937 INFO L225 Difference]: With dead ends: 83 [2021-05-02 20:06:42,937 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 20:06:42,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:06:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 20:06:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2021-05-02 20:06:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:06:42,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 20:06:42,941 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 31 [2021-05-02 20:06:42,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:42,941 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 20:06:42,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:06:42,941 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 20:06:42,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:06:42,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:42,942 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:43,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:06:43,157 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:43,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:43,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1490579311, now seen corresponding path program 3 times [2021-05-02 20:06:43,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:43,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438490555] [2021-05-02 20:06:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:43,166 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:43,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490258077] [2021-05-02 20:06:43,166 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 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 20:06:43,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:06:43,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:06:43,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 20:06:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:43,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:06:43,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:43,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438490555] [2021-05-02 20:06:43,403 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:43,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490258077] [2021-05-02 20:06:43,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490258077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:06:43,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:06:43,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:06:43,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347234209] [2021-05-02 20:06:43,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:06:43,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:43,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:06:43,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:06:43,405 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:06:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:43,509 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-05-02 20:06:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:06:43,510 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2021-05-02 20:06:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:43,510 INFO L225 Difference]: With dead ends: 62 [2021-05-02 20:06:43,510 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 20:06:43,511 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:06:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 20:06:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-05-02 20:06:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:06:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-05-02 20:06:43,513 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2021-05-02 20:06:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:43,513 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-05-02 20:06:43,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:06:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-05-02 20:06:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:06:43,514 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:43,514 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:43,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:43,718 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:43,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:43,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1815734547, now seen corresponding path program 4 times [2021-05-02 20:06:43,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:43,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544715656] [2021-05-02 20:06:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:43,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:43,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645006057] [2021-05-02 20:06:43,726 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 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 20:06:43,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:06:43,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:06:43,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:06:43,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:43,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:43,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:06:44,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:44,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544715656] [2021-05-02 20:06:44,066 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:44,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645006057] [2021-05-02 20:06:44,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645006057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:06:44,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:06:44,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:06:44,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650566059] [2021-05-02 20:06:44,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:06:44,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:44,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:06:44,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:06:44,067 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:06:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:44,167 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-05-02 20:06:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:06:44,167 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2021-05-02 20:06:44,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:44,168 INFO L225 Difference]: With dead ends: 51 [2021-05-02 20:06:44,168 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:06:44,168 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:06:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:06:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 20:06:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:06:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-05-02 20:06:44,171 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2021-05-02 20:06:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:44,171 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-05-02 20:06:44,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:06:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-05-02 20:06:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:06:44,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:44,172 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:44,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:44,381 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash -79763386, now seen corresponding path program 5 times [2021-05-02 20:06:44,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:44,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221178849] [2021-05-02 20:06:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:44,388 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:44,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473709456] [2021-05-02 20:06:44,388 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 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 20:06:44,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-02 20:06:44,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:06:44,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 20:06:44,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:44,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:44,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:44,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:44,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:44,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:44,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:06:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:06:44,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:44,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221178849] [2021-05-02 20:06:44,931 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:44,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473709456] [2021-05-02 20:06:44,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473709456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:06:44,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:06:44,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:06:44,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372768417] [2021-05-02 20:06:44,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:06:44,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:06:44,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:06:44,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:06:44,933 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:06:45,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:06:45,172 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2021-05-02 20:06:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:06:45,172 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2021-05-02 20:06:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:06:45,173 INFO L225 Difference]: With dead ends: 81 [2021-05-02 20:06:45,173 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 20:06:45,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:06:45,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 20:06:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2021-05-02 20:06:45,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:06:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-05-02 20:06:45,178 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 39 [2021-05-02 20:06:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:06:45,178 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-05-02 20:06:45,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:06:45,178 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-05-02 20:06:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:06:45,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:06:45,179 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:06:45,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:06:45,382 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:06:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:06:45,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1741211487, now seen corresponding path program 6 times [2021-05-02 20:06:45,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:06:45,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097709032] [2021-05-02 20:06:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:06:45,389 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:06:45,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428929101] [2021-05-02 20:06:45,390 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 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