/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:59:24,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:59:24,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:59:24,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:59:24,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:59:24,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:59:24,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:59:25,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:59:25,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:59:25,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:59:25,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:59:25,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:59:25,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:59:25,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:59:25,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:59:25,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:59:25,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:59:25,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:59:25,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:59:25,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:59:25,110 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 03:59:25,137 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:59:25,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:59:25,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:59:25,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:59:25,140 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:59:25,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:59:25,140 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:59:25,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:59:25,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:59:25,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:59:25,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:59:25,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:59:25,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:59:25,141 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:59:25,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:59:25,141 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:59:25,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:59:25,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:59:25,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:59:25,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:59:25,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:59:25,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:59:25,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:59:25,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:59:25,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:59:25,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:59:25,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:59:25,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:59:25,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:59:25,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:59:25,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:59:25,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:59:25,363 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:59:25,364 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:59:25,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound2.c [2021-05-06 03:59:25,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a17dd7b78/2e989834517949a1bcc4f81196d5aee3/FLAGfff3578fa [2021-05-06 03:59:25,741 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:59:25,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound2.c [2021-05-06 03:59:25,747 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a17dd7b78/2e989834517949a1bcc4f81196d5aee3/FLAGfff3578fa [2021-05-06 03:59:26,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a17dd7b78/2e989834517949a1bcc4f81196d5aee3 [2021-05-06 03:59:26,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:59:26,171 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:59:26,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:59:26,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:59:26,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:59:26,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:59:26" (1/1) ... [2021-05-06 03:59:26,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@99c08c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:59:26, skipping insertion in model container [2021-05-06 03:59:26,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:59:26" (1/1) ... [2021-05-06 03:59:26,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:59:26,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:59:26,301 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/lcm2_unwindbound2.c[545,558] [2021-05-06 03:59:26,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:59:26,330 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:59:26,370 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/lcm2_unwindbound2.c[545,558] [2021-05-06 03:59:26,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:59:26,383 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:59:26,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:59:26 WrapperNode [2021-05-06 03:59:26,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:59:26,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:59:26,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:59:26,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:59:26,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:59:26" (1/1) ... [2021-05-06 03:59:26,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:59:26" (1/1) ... [2021-05-06 03:59:26,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:59:26" (1/1) ... [2021-05-06 03:59:26,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:59:26" (1/1) ... [2021-05-06 03:59:26,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:59:26" (1/1) ... [2021-05-06 03:59:26,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:59:26" (1/1) ... [2021-05-06 03:59:26,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:59:26" (1/1) ... [2021-05-06 03:59:26,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:59:26,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:59:26,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:59:26,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:59:26,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:59:26" (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 03:59:26,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:59:26,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:59:26,472 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:59:26,472 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:59:26,472 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:59:26,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:59:26,472 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:59:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:59:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:59:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:59:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:59:26,473 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:59:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:59:26,474 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:59:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:59:26,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:59:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:59:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:59:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:59:26,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:59:26,670 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:59:26,671 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 03:59:26,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:59:26 BoogieIcfgContainer [2021-05-06 03:59:26,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:59:26,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:59:26,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:59:26,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:59:26,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:59:26" (1/3) ... [2021-05-06 03:59:26,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e8410c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:59:26, skipping insertion in model container [2021-05-06 03:59:26,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:59:26" (2/3) ... [2021-05-06 03:59:26,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e8410c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:59:26, skipping insertion in model container [2021-05-06 03:59:26,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:59:26" (3/3) ... [2021-05-06 03:59:26,676 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound2.c [2021-05-06 03:59:26,679 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:59:26,681 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:59:26,691 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:59:26,704 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:59:26,705 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:59:26,705 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:59:26,705 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:59:26,705 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:59:26,705 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:59:26,705 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:59:26,705 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:59:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:59:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 03:59:26,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:59:26,717 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 03:59:26,718 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:59:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:59:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 1 times [2021-05-06 03:59:26,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:59:26,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164070918] [2021-05-06 03:59:26,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:59:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:59:26,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:59:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:59:26,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:59:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:59:26,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 03:59:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:59:26,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-06 03:59:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:59:26,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-06 03:59:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:59:26,900 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 03:59:26,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:59:26,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164070918] [2021-05-06 03:59:26,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164070918] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:59:26,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:59:26,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:59:26,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100611186] [2021-05-06 03:59:26,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:59:26,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:59:26,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:59:26,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:59:26,913 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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 03:59:26,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:59:26,982 INFO L93 Difference]: Finished difference Result 58 states and 82 transitions. [2021-05-06 03:59:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:59:26,983 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 03:59:26,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:59:26,988 INFO L225 Difference]: With dead ends: 58 [2021-05-06 03:59:26,988 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 03:59:26,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:59:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 03:59:27,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-06 03:59:27,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 03:59:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-06 03:59:27,015 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 32 [2021-05-06 03:59:27,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:59:27,015 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-06 03:59:27,015 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 03:59:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-06 03:59:27,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:59:27,016 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:59:27,017 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 03:59:27,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:59:27,017 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:59:27,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:59:27,017 INFO L82 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 1 times [2021-05-06 03:59:27,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:59:27,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204668731] [2021-05-06 03:59:27,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:59:27,036 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:59:27,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448723655] [2021-05-06 03:59:27,036 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 03:59:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:59:27,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 03:59:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:59:27,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:27,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:27,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:27,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:27,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:27,253 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 03:59:27,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:59:27,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204668731] [2021-05-06 03:59:27,253 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:59:27,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448723655] [2021-05-06 03:59:27,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448723655] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:59:27,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:59:27,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 03:59:27,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904268950] [2021-05-06 03:59:27,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 03:59:27,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:59:27,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 03:59:27,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:59:27,256 INFO L87 Difference]: Start difference. First operand 27 states and 33 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 03:59:27,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:59:27,271 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-05-06 03:59:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 03:59:27,272 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 03:59:27,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:59:27,275 INFO L225 Difference]: With dead ends: 36 [2021-05-06 03:59:27,275 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 03:59:27,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:59:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 03:59:27,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 03:59:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 03:59:27,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 03:59:27,286 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 33 [2021-05-06 03:59:27,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:59:27,287 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 03:59:27,287 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 03:59:27,287 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 03:59:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:59:27,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:59:27,288 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 03:59:27,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 03:59:27,488 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:59:27,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:59:27,489 INFO L82 PathProgramCache]: Analyzing trace with hash -754622278, now seen corresponding path program 1 times [2021-05-06 03:59:27,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:59:27,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707309542] [2021-05-06 03:59:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:59:27,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:59:27,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989321340] [2021-05-06 03:59:27,507 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 03:59:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:59:27,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 03:59:27,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:59:27,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:27,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:27,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:27,787 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 03:59:27,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:59:27,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707309542] [2021-05-06 03:59:27,787 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:59:27,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989321340] [2021-05-06 03:59:27,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989321340] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:59:27,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:59:27,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:59:27,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537844329] [2021-05-06 03:59:27,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:59:27,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:59:27,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:59:27,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:59:27,789 INFO L87 Difference]: Start difference. First operand 29 states and 35 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 03:59:27,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:59:27,838 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-05-06 03:59:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:59:27,838 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 03:59:27,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:59:27,840 INFO L225 Difference]: With dead ends: 39 [2021-05-06 03:59:27,840 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 03:59:27,840 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:59:27,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 03:59:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-06 03:59:27,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 03:59:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-05-06 03:59:27,845 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 33 [2021-05-06 03:59:27,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:59:27,845 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-05-06 03:59:27,845 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 03:59:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-05-06 03:59:27,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 03:59:27,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:59:27,846 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 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, 1] [2021-05-06 03:59:28,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:59:28,047 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:59:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:59:28,047 INFO L82 PathProgramCache]: Analyzing trace with hash 756635198, now seen corresponding path program 1 times [2021-05-06 03:59:28,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:59:28,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691780783] [2021-05-06 03:59:28,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:59:28,059 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:59:28,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122508333] [2021-05-06 03:59:28,059 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 [2021-05-06 03:59:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:59:28,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:59:28,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:59:28,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:28,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:28,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:28,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:28,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:28,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:28,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:28,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:59:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 03:59:28,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:59:28,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691780783] [2021-05-06 03:59:28,197 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:59:28,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122508333] [2021-05-06 03:59:28,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122508333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:59:28,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:59:28,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 03:59:28,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015473593] [2021-05-06 03:59:28,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:59:28,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:59:28,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:59:28,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:59:28,199 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:59:28,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:59:28,235 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-05-06 03:59:28,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:59:28,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 03:59:28,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:59:28,238 INFO L225 Difference]: With dead ends: 45 [2021-05-06 03:59:28,238 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 03:59:28,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:59:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 03:59:28,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 03:59:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 03:59:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-05-06 03:59:28,251 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 42 [2021-05-06 03:59:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:59:28,252 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-05-06 03:59:28,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:59:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-05-06 03:59:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 03:59:28,253 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:59:28,253 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:59:28,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:59:28,469 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:59:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:59:28,469 INFO L82 PathProgramCache]: Analyzing trace with hash 758422658, now seen corresponding path program 1 times [2021-05-06 03:59:28,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:59:28,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493665826] [2021-05-06 03:59:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:59:28,480 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:59:28,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812975616] [2021-05-06 03:59:28,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true