/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/ps4-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:22:27,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:22:27,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:22:27,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 22:22:27,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:22:27,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:22:27,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:22:27,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:22:27,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:22:27,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:22:27,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:22:27,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:22:27,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:22:27,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:22:27,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:22:27,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:22:27,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:22:27,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:22:27,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:22:27,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:22:27,765 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:22:27,779 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:22:27,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:22:27,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:22:27,782 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:22:27,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:22:27,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:22:27,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:22:27,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:22:27,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:22:27,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:22:27,783 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:22:27,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:22:27,784 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:22:27,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:22:27,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:22:27,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:22:27,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:22:27,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:22:27,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:22:27,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:22:27,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:22:27,785 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:22:27,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:22:28,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:22:28,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:22:28,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:22:28,084 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:22:28,085 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:22:28,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound5.c [2021-05-02 22:22:28,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1fae58c/11a94b36c51f4f77815acac84f4da0e9/FLAGb60ead596 [2021-05-02 22:22:28,520 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:22:28,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound5.c [2021-05-02 22:22:28,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1fae58c/11a94b36c51f4f77815acac84f4da0e9/FLAGb60ead596 [2021-05-02 22:22:28,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1fae58c/11a94b36c51f4f77815acac84f4da0e9 [2021-05-02 22:22:28,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:22:28,547 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:22:28,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:22:28,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:22:28,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:22:28,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:22:28" (1/1) ... [2021-05-02 22:22:28,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f29f1ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:22:28, skipping insertion in model container [2021-05-02 22:22:28,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:22:28" (1/1) ... [2021-05-02 22:22:28,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:22:28,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:22:28,699 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/ps4-ll_valuebound5.c[458,471] [2021-05-02 22:22:28,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:22:28,720 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:22:28,745 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/ps4-ll_valuebound5.c[458,471] [2021-05-02 22:22:28,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:22:28,779 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:22:28,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:22:28 WrapperNode [2021-05-02 22:22:28,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:22:28,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:22:28,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:22:28,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:22:28,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:22:28" (1/1) ... [2021-05-02 22:22:28,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:22:28" (1/1) ... [2021-05-02 22:22:28,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:22:28" (1/1) ... [2021-05-02 22:22:28,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:22:28" (1/1) ... [2021-05-02 22:22:28,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:22:28" (1/1) ... [2021-05-02 22:22:28,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:22:28" (1/1) ... [2021-05-02 22:22:28,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:22:28" (1/1) ... [2021-05-02 22:22:28,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:22:28,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:22:28,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:22:28,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:22:28,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:22:28" (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 22:22:28,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:22:28,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:22:28,877 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:22:28,877 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:22:28,877 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:22:28,877 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:22:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:22:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:22:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:22:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:22:28,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:22:28,878 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:22:28,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:22:28,878 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:22:28,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:22:28,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:22:28,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:22:28,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:22:28,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:22:28,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:22:29,118 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:22:29,118 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:22:29,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:22:29 BoogieIcfgContainer [2021-05-02 22:22:29,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:22:29,127 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:22:29,127 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:22:29,127 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:22:29,129 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:22:29" (1/1) ... [2021-05-02 22:22:29,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:22:29 BasicIcfg [2021-05-02 22:22:29,154 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:22:29,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:22:29,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:22:29,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:22:29,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:22:28" (1/4) ... [2021-05-02 22:22:29,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688c49df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:22:29, skipping insertion in model container [2021-05-02 22:22:29,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:22:28" (2/4) ... [2021-05-02 22:22:29,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688c49df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:22:29, skipping insertion in model container [2021-05-02 22:22:29,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:22:29" (3/4) ... [2021-05-02 22:22:29,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688c49df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:22:29, skipping insertion in model container [2021-05-02 22:22:29,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:22:29" (4/4) ... [2021-05-02 22:22:29,159 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound5.cJordan [2021-05-02 22:22:29,163 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:22:29,165 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:22:29,177 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:22:29,190 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:22:29,190 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:22:29,190 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:22:29,190 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:22:29,190 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:22:29,190 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:22:29,190 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:22:29,190 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:22:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:22:29,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:22:29,203 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:29,203 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:29,204 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:29,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:29,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1885409022, now seen corresponding path program 1 times [2021-05-02 22:22:29,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:29,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246667911] [2021-05-02 22:22:29,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:22:29,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:22:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:22:29,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:22:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:22:29,461 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 22:22:29,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:29,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246667911] [2021-05-02 22:22:29,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246667911] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:22:29,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:22:29,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:22:29,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150380685] [2021-05-02 22:22:29,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:22:29,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:29,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:22:29,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:22:29,480 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 22:22:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:29,544 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-05-02 22:22:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:22:29,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 17 [2021-05-02 22:22:29,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:29,551 INFO L225 Difference]: With dead ends: 28 [2021-05-02 22:22:29,551 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 22:22:29,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:22:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 22:22:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 22:22:29,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:22:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-05-02 22:22:29,579 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2021-05-02 22:22:29,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:29,579 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-05-02 22:22:29,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 22:22:29,579 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-05-02 22:22:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:22:29,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:29,580 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:29,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:22:29,581 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:29,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:29,582 INFO L82 PathProgramCache]: Analyzing trace with hash 603980644, now seen corresponding path program 1 times [2021-05-02 22:22:29,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:29,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789372286] [2021-05-02 22:22:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:29,614 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:29,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374385140] [2021-05-02 22:22:29,614 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 22:22:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:22:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:22:29,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:29,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:29,847 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 22:22:29,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:29,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789372286] [2021-05-02 22:22:29,847 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:29,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374385140] [2021-05-02 22:22:29,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374385140] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:22:29,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:22:29,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 22:22:29,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289359115] [2021-05-02 22:22:29,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:22:29,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:29,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:22:29,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:22:29,850 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:22:29,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:29,902 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-02 22:22:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:22:29,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:22:29,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:29,903 INFO L225 Difference]: With dead ends: 32 [2021-05-02 22:22:29,903 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 22:22:29,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:22:29,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 22:22:29,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 22:22:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:22:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-02 22:22:29,920 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-05-02 22:22:29,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:29,922 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-02 22:22:29,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:22:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-02 22:22:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 22:22:29,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:29,927 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] [2021-05-02 22:22:30,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:22:30,145 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:30,146 INFO L82 PathProgramCache]: Analyzing trace with hash -169450186, now seen corresponding path program 1 times [2021-05-02 22:22:30,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:30,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102145225] [2021-05-02 22:22:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:30,153 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:30,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252679347] [2021-05-02 22:22:30,154 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 22:22:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:22:30,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:22:30,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:30,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:22:30,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:30,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102145225] [2021-05-02 22:22:30,317 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:30,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252679347] [2021-05-02 22:22:30,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252679347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:22:30,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:22:30,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:22:30,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551829203] [2021-05-02 22:22:30,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:22:30,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:30,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:22:30,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:22:30,318 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 22:22:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:30,402 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-05-02 22:22:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:22:30,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 24 [2021-05-02 22:22:30,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:30,403 INFO L225 Difference]: With dead ends: 39 [2021-05-02 22:22:30,403 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 22:22:30,403 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:22:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 22:22:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 22:22:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:22:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-02 22:22:30,407 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2021-05-02 22:22:30,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:30,407 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-02 22:22:30,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 22:22:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-02 22:22:30,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 22:22:30,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:30,408 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:30,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:22:30,621 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:30,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:30,622 INFO L82 PathProgramCache]: Analyzing trace with hash -434891502, now seen corresponding path program 1 times [2021-05-02 22:22:30,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:30,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244965726] [2021-05-02 22:22:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:30,629 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:30,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733876988] [2021-05-02 22:22:30,629 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 22:22:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:22:30,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 22:22:30,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:30,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:30,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:30,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:30,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:30,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:30,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:30,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:30,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:30,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:30,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 22:22:30,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:30,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244965726] [2021-05-02 22:22:30,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:30,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733876988] [2021-05-02 22:22:30,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733876988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:22:30,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:22:30,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:22:30,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183208497] [2021-05-02 22:22:30,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:22:30,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:30,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:22:30,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:22:30,820 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:22:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:30,925 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-02 22:22:30,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:22:30,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-02 22:22:30,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:30,927 INFO L225 Difference]: With dead ends: 42 [2021-05-02 22:22:30,927 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 22:22:30,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:22:30,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 22:22:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 22:22:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:22:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-05-02 22:22:30,931 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2021-05-02 22:22:30,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:30,931 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-05-02 22:22:30,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:22:30,931 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-05-02 22:22:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 22:22:30,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:30,932 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:31,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:22:31,142 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:31,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:31,142 INFO L82 PathProgramCache]: Analyzing trace with hash -570969308, now seen corresponding path program 2 times [2021-05-02 22:22:31,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:31,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445015844] [2021-05-02 22:22:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:31,152 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:31,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155026978] [2021-05-02 22:22:31,152 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 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 22:22:31,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:22:31,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:22:31,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:22:31,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:22:31,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:31,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445015844] [2021-05-02 22:22:31,381 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:31,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155026978] [2021-05-02 22:22:31,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155026978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:22:31,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:22:31,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:22:31,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812983443] [2021-05-02 22:22:31,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:22:31,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:31,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:22:31,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:22:31,389 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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 22:22:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:33,567 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-05-02 22:22:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:22:33,568 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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 31 [2021-05-02 22:22:33,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:33,569 INFO L225 Difference]: With dead ends: 46 [2021-05-02 22:22:33,569 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 22:22:33,569 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:22:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 22:22:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 22:22:33,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:22:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-05-02 22:22:33,572 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 31 [2021-05-02 22:22:33,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:33,573 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-05-02 22:22:33,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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 22:22:33,573 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-05-02 22:22:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 22:22:33,573 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:33,573 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:33,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:22:33,774 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:33,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:33,775 INFO L82 PathProgramCache]: Analyzing trace with hash 725792896, now seen corresponding path program 2 times [2021-05-02 22:22:33,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:33,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57445031] [2021-05-02 22:22:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:33,781 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:33,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545353559] [2021-05-02 22:22:33,781 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 22:22:33,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:22:33,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:22:33,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 22:22:33,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:33,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:33,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:33,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:33,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:33,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:33,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:33,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:33,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:33,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 22:22:33,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:33,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57445031] [2021-05-02 22:22:33,970 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:33,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545353559] [2021-05-02 22:22:33,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545353559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:22:33,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:22:33,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:22:33,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672758430] [2021-05-02 22:22:33,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:22:33,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:33,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:22:33,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:22:33,972 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 22:22:34,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:34,071 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-05-02 22:22:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:22:34,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-02 22:22:34,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:34,072 INFO L225 Difference]: With dead ends: 49 [2021-05-02 22:22:34,072 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 22:22:34,072 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:22:34,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 22:22:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 22:22:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:22:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-02 22:22:34,075 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-05-02 22:22:34,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:34,076 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-02 22:22:34,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 22:22:34,076 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-02 22:22:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 22:22:34,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:34,076 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:34,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 22:22:34,294 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:34,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:34,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1050508662, now seen corresponding path program 3 times [2021-05-02 22:22:34,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:34,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610286462] [2021-05-02 22:22:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:34,301 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:34,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412539475] [2021-05-02 22:22:34,301 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