/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/lcm1_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:22:54,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:22:54,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:22:54,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 09:22:54,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 09:22:54,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 09:22:54,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 09:22:54,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 09:22:54,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 09:22:54,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 09:22:54,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 09:22:54,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 09:22:54,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:22:54,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:22:54,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:22:54,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:22:54,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:22:54,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:22:54,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:22:54,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:22:54,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:22:54,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:22:54,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:22:54,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:22:54,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:22:54,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:22:54,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:22:54,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:22:54,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:22:54,451 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:22:54,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:22:54,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:22:54,453 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:22:54,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:22:54,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:22:54,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:22:54,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:22:54,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:22:54,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:22:54,454 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:22:54,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:22:54,455 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:22:54,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:22:54,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:22:54,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:22:54,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:22:54,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:22:54,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:22:54,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:22:54,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:22:54,456 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:22:54,456 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:22:54,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:22:54,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:22:54,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:22:54,751 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:22:54,752 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:22:54,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound100.c [2021-05-06 09:22:54,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/229512132/cfd2d5aa4e984209a7bc7c2081a5a134/FLAG5a7db54b9 [2021-05-06 09:22:55,155 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:22:55,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound100.c [2021-05-06 09:22:55,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/229512132/cfd2d5aa4e984209a7bc7c2081a5a134/FLAG5a7db54b9 [2021-05-06 09:22:55,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/229512132/cfd2d5aa4e984209a7bc7c2081a5a134 [2021-05-06 09:22:55,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:22:55,173 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:22:55,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:22:55,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:22:55,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:22:55,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:22:55" (1/1) ... [2021-05-06 09:22:55,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30db6dc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:22:55, skipping insertion in model container [2021-05-06 09:22:55,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:22:55" (1/1) ... [2021-05-06 09:22:55,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:22:55,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:22:55,286 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/lcm1_unwindbound100.c[560,573] [2021-05-06 09:22:55,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:22:55,314 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:22:55,323 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/lcm1_unwindbound100.c[560,573] [2021-05-06 09:22:55,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:22:55,339 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:22:55,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:22:55 WrapperNode [2021-05-06 09:22:55,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:22:55,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:22:55,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:22:55,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:22:55,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:22:55" (1/1) ... [2021-05-06 09:22:55,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:22:55" (1/1) ... [2021-05-06 09:22:55,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:22:55" (1/1) ... [2021-05-06 09:22:55,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:22:55" (1/1) ... [2021-05-06 09:22:55,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:22:55" (1/1) ... [2021-05-06 09:22:55,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:22:55" (1/1) ... [2021-05-06 09:22:55,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:22:55" (1/1) ... [2021-05-06 09:22:55,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:22:55,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:22:55,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:22:55,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:22:55,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:22:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:22:55,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:22:55,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:22:55,587 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:22:55,587 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:22:55,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:22:55,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:22:55,587 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:22:55,588 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:22:55,588 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:22:55,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:22:55,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 09:22:55,588 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:22:55,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:22:55,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:22:55,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:22:55,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:22:55,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:22:55,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:22:55,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:22:55,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:22:55,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:22:55,887 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 09:22:55,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:22:55 BoogieIcfgContainer [2021-05-06 09:22:55,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:22:55,889 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:22:55,889 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:22:55,889 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:22:55,891 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:22:55" (1/1) ... [2021-05-06 09:22:55,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:22:55 BasicIcfg [2021-05-06 09:22:55,907 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:22:55,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:22:55,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:22:55,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:22:55,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:22:55" (1/4) ... [2021-05-06 09:22:55,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130d3c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:22:55, skipping insertion in model container [2021-05-06 09:22:55,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:22:55" (2/4) ... [2021-05-06 09:22:55,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130d3c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:22:55, skipping insertion in model container [2021-05-06 09:22:55,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:22:55" (3/4) ... [2021-05-06 09:22:55,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130d3c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:22:55, skipping insertion in model container [2021-05-06 09:22:55,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:22:55" (4/4) ... [2021-05-06 09:22:55,917 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound100.cJordan [2021-05-06 09:22:55,921 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:22:55,924 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:22:55,935 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:22:55,958 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:22:55,958 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:22:55,958 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:22:55,958 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:22:55,958 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:22:55,958 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:22:55,958 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:22:55,958 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:22:55,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 09:22:55,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 09:22:55,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:22:55,985 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:22:55,985 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:22:55,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:22:55,990 INFO L82 PathProgramCache]: Analyzing trace with hash -615641025, now seen corresponding path program 1 times [2021-05-06 09:22:55,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:22:55,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925973176] [2021-05-06 09:22:55,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:22:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:22:56,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:22:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:22:56,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:22:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:22:56,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 09:22:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:22:56,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-06 09:22:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:22:56,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-06 09:22:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:22:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 09:22:56,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:22:56,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925973176] [2021-05-06 09:22:56,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925973176] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:22:56,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:22:56,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:22:56,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045470189] [2021-05-06 09:22:56,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:22:56,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:22:56,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:22:56,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:22:56,199 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:22:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:22:56,438 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-05-06 09:22:56,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:22:56,440 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-06 09:22:56,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:22:56,446 INFO L225 Difference]: With dead ends: 41 [2021-05-06 09:22:56,447 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 09:22:56,448 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:22:56,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 09:22:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-06 09:22:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 09:22:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2021-05-06 09:22:56,480 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 32 [2021-05-06 09:22:56,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:22:56,480 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2021-05-06 09:22:56,480 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:22:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2021-05-06 09:22:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 09:22:56,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:22:56,482 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:22:56,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:22:56,482 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:22:56,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:22:56,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1244400054, now seen corresponding path program 1 times [2021-05-06 09:22:56,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:22:56,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118042354] [2021-05-06 09:22:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:22:56,517 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:22:56,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939370464] [2021-05-06 09:22:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:22:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:22:56,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 09:22:56,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:22:56,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:22:56,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:22:56,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:22:56,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:22:56,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:22:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 09:22:56,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:22:56,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118042354] [2021-05-06 09:22:56,904 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:22:56,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939370464] [2021-05-06 09:22:56,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939370464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:22:56,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:22:56,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 09:22:56,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030793958] [2021-05-06 09:22:56,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 09:22:56,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:22:56,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 09:22:56,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:22:56,908 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:22:56,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:22:56,928 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2021-05-06 09:22:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 09:22:56,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 09:22:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:22:56,932 INFO L225 Difference]: With dead ends: 37 [2021-05-06 09:22:56,933 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 09:22:56,933 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:22:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 09:22:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 09:22:56,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 09:22:56,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2021-05-06 09:22:56,948 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 33 [2021-05-06 09:22:56,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:22:56,949 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2021-05-06 09:22:56,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:22:56,950 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2021-05-06 09:22:56,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 09:22:56,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:22:56,951 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:22:57,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 09:22:57,173 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:22:57,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:22:57,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1245472530, now seen corresponding path program 1 times [2021-05-06 09:22:57,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:22:57,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273994583] [2021-05-06 09:22:57,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:22:57,200 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:22:57,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982234959] [2021-05-06 09:22:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:22:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:22:57,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:22:57,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:22:57,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:22:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 09:22:57,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:22:57,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273994583] [2021-05-06 09:22:57,429 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:22:57,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982234959] [2021-05-06 09:22:57,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982234959] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:22:57,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:22:57,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:22:57,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372450238] [2021-05-06 09:22:57,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:22:57,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:22:57,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:22:57,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:22:57,431 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 09:22:57,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:22:57,548 INFO L93 Difference]: Finished difference Result 55 states and 76 transitions. [2021-05-06 09:22:57,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:22:57,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-06 09:22:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:22:57,549 INFO L225 Difference]: With dead ends: 55 [2021-05-06 09:22:57,549 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 09:22:57,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:22:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 09:22:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-05-06 09:22:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 09:22:57,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2021-05-06 09:22:57,555 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 33 [2021-05-06 09:22:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:22:57,555 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2021-05-06 09:22:57,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 09:22:57,555 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2021-05-06 09:22:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 09:22:57,556 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:22:57,556 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:22:57,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:22:57,786 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:22:57,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:22:57,787 INFO L82 PathProgramCache]: Analyzing trace with hash -64495806, now seen corresponding path program 1 times [2021-05-06 09:22:57,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:22:57,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812344339] [2021-05-06 09:22:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:22:57,797 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:22:57,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54715395] [2021-05-06 09:22:57,797 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