/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/egcd-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:44:14,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:44:14,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:44:14,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:44:14,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:44:14,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:44:14,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:44:14,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:44:14,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:44:14,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:44:14,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:44:14,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:44:14,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:44:14,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:44:14,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:44:14,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:44:14,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:44:14,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:44:14,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:44:14,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:44:14,848 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 [2021-05-02 14:44:14,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:44:14,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:44:14,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:44:14,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:44:14,880 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:44:14,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:44:14,881 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:44:14,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:44:14,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:44:14,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:44:14,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:44:14,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:44:14,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:44:14,881 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:44:14,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:44:14,882 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:44:14,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:44:14,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:44:14,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:44:14,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:44:14,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:44:14,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:44:14,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:44:14,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:44:14,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:44:14,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:44:14,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:44:14,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:44:14,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:44:15,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:44:15,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:44:15,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:44:15,194 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:44:15,194 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:44:15,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound2.c [2021-05-02 14:44:15,254 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d94c29608/6c3fc6c036cf4cbe90744efc8fc64dcd/FLAGd0a2d958f [2021-05-02 14:44:15,618 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:44:15,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound2.c [2021-05-02 14:44:15,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d94c29608/6c3fc6c036cf4cbe90744efc8fc64dcd/FLAGd0a2d958f [2021-05-02 14:44:15,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d94c29608/6c3fc6c036cf4cbe90744efc8fc64dcd [2021-05-02 14:44:15,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:44:15,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:44:15,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:44:15,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:44:15,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:44:15,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:44:15" (1/1) ... [2021-05-02 14:44:15,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44621adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:15, skipping insertion in model container [2021-05-02 14:44:15,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:44:15" (1/1) ... [2021-05-02 14:44:15,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:44:15,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:44:15,835 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/egcd-ll_unwindbound2.c[489,502] [2021-05-02 14:44:15,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:44:15,854 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:44:15,916 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/egcd-ll_unwindbound2.c[489,502] [2021-05-02 14:44:15,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:44:15,944 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:44:15,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:15 WrapperNode [2021-05-02 14:44:15,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:44:15,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:44:15,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:44:15,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:44:15,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:15" (1/1) ... [2021-05-02 14:44:15,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:15" (1/1) ... [2021-05-02 14:44:15,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:15" (1/1) ... [2021-05-02 14:44:15,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:15" (1/1) ... [2021-05-02 14:44:15,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:15" (1/1) ... [2021-05-02 14:44:15,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:15" (1/1) ... [2021-05-02 14:44:15,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:15" (1/1) ... [2021-05-02 14:44:15,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:44:15,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:44:15,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:44:15,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:44:15,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:44:16,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:44:16,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:44:16,027 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:44:16,027 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:44:16,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:44:16,028 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:44:16,028 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:44:16,028 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:44:16,028 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:44:16,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:44:16,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:44:16,028 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:44:16,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:44:16,028 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:44:16,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:44:16,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:44:16,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:44:16,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:44:16,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:44:16,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:44:16,206 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:44:16,206 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 14:44:16,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:44:16 BoogieIcfgContainer [2021-05-02 14:44:16,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:44:16,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:44:16,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:44:16,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:44:16,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:44:15" (1/3) ... [2021-05-02 14:44:16,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6062e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:44:16, skipping insertion in model container [2021-05-02 14:44:16,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:15" (2/3) ... [2021-05-02 14:44:16,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6062e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:44:16, skipping insertion in model container [2021-05-02 14:44:16,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:44:16" (3/3) ... [2021-05-02 14:44:16,213 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound2.c [2021-05-02 14:44:16,218 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:44:16,220 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:44:16,233 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:44:16,252 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:44:16,252 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:44:16,252 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:44:16,252 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:44:16,252 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:44:16,253 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:44:16,253 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:44:16,253 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:44:16,266 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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) [2021-05-02 14:44:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 14:44:16,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:16,270 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:16,270 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:16,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2021-05-02 14:44:16,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:16,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800771185] [2021-05-02 14:44:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:16,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:44:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:16,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:44:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:16,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:44:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:44:16,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:16,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800771185] [2021-05-02 14:44:16,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800771185] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:16,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:16,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:44:16,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835669294] [2021-05-02 14:44:16,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:44:16,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:16,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:44:16,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:44:16,541 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:44:16,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:16,697 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2021-05-02 14:44:16,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:44:16,699 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 14:44:16,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:16,705 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:44:16,706 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 14:44:16,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:44:16,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 14:44:16,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-02 14:44:16,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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) [2021-05-02 14:44:16,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-02 14:44:16,754 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-02 14:44:16,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:16,755 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-02 14:44:16,755 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:44:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-02 14:44:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:44:16,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:16,758 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:16,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:44:16,758 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:16,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:16,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2021-05-02 14:44:16,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:16,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216465935] [2021-05-02 14:44:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:16,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:44:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:16,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:44:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:16,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:44:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:44:16,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:16,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216465935] [2021-05-02 14:44:16,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216465935] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:16,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:16,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:44:16,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830809700] [2021-05-02 14:44:16,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:44:16,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:16,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:44:16,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:44:16,964 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:44:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:17,125 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-05-02 14:44:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:44:17,125 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 14:44:17,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:17,128 INFO L225 Difference]: With dead ends: 42 [2021-05-02 14:44:17,128 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 14:44:17,130 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:44:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 14:44:17,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 14:44:17,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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) [2021-05-02 14:44:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 14:44:17,147 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-02 14:44:17,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:17,149 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 14:44:17,149 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:44:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 14:44:17,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:44:17,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:17,153 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:17,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 14:44:17,154 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:17,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:17,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2021-05-02 14:44:17,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:17,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735607536] [2021-05-02 14:44:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:17,181 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:17,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866196725] [2021-05-02 14:44:17,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:17,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:44:17,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:17,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:44:17,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:17,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735607536] [2021-05-02 14:44:17,358 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:17,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866196725] [2021-05-02 14:44:17,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866196725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:17,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:17,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:44:17,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942790525] [2021-05-02 14:44:17,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:44:17,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:17,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:44:17,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:44:17,360 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:44:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:17,424 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-05-02 14:44:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:44:17,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-02 14:44:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:17,426 INFO L225 Difference]: With dead ends: 49 [2021-05-02 14:44:17,426 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 14:44:17,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:17,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 14:44:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-02 14:44:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:44:17,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-02 14:44:17,435 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-02 14:44:17,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:17,435 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-02 14:44:17,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:44:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-02 14:44:17,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 14:44:17,436 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:17,436 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:17,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 14:44:17,653 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:17,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2021-05-02 14:44:17,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:17,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257371633] [2021-05-02 14:44:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:17,671 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:17,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197270873] [2021-05-02 14:44:17,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:17,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:44:17,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:17,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:17,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:17,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:17,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:17,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:17,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:17,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:17,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:17,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:17,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:44:17,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:17,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257371633] [2021-05-02 14:44:17,891 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:17,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197270873] [2021-05-02 14:44:17,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197270873] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:17,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:17,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:44:17,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030385552] [2021-05-02 14:44:17,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:44:17,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:17,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:44:17,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:17,895 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:44:18,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:18,007 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2021-05-02 14:44:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:44:18,008 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 14:44:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:18,010 INFO L225 Difference]: With dead ends: 71 [2021-05-02 14:44:18,010 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 14:44:18,011 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 14:44:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-02 14:44:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:44:18,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-02 14:44:18,036 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-02 14:44:18,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:18,036 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-02 14:44:18,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:44:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-02 14:44:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:44:18,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:18,038 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:18,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:18,253 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:18,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:18,253 INFO L82 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2021-05-02 14:44:18,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:18,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001414429] [2021-05-02 14:44:18,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:18,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:18,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808285464] [2021-05-02 14:44:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:18,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:44:18,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:18,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:18,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:18,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:18,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:18,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:18,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:18,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:18,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:18,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:18,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:18,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:18,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:18,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:18,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 14:44:18,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:18,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001414429] [2021-05-02 14:44:18,517 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:18,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808285464] [2021-05-02 14:44:18,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808285464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:18,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:18,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:44:18,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855545730] [2021-05-02 14:44:18,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:44:18,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:18,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:44:18,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:18,519 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:44:18,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:18,635 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2021-05-02 14:44:18,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:44:18,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-05-02 14:44:18,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:18,639 INFO L225 Difference]: With dead ends: 69 [2021-05-02 14:44:18,639 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 14:44:18,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:18,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 14:44:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 14:44:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 14:44:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-02 14:44:18,657 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-02 14:44:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:18,658 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-02 14:44:18,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:44:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-02 14:44:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 14:44:18,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:18,660 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1] [2021-05-02 14:44:18,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:18,875 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:18,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:18,876 INFO L82 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2021-05-02 14:44:18,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:18,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275400590] [2021-05-02 14:44:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:18,885 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:18,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012846974] [2021-05-02 14:44:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:18,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 14:44:18,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:44:19,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:19,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275400590] [2021-05-02 14:44:19,011 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:19,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012846974] [2021-05-02 14:44:19,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012846974] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:19,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:19,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:44:19,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186619331] [2021-05-02 14:44:19,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:44:19,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:19,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:44:19,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:44:19,013 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 14:44:19,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:19,050 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2021-05-02 14:44:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:44:19,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-02 14:44:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:19,051 INFO L225 Difference]: With dead ends: 77 [2021-05-02 14:44:19,051 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 14:44:19,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:44:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 14:44:19,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-02 14:44:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:44:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-02 14:44:19,060 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-02 14:44:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:19,060 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-02 14:44:19,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 14:44:19,060 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-02 14:44:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 14:44:19,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:19,061 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:19,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:19,277 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:19,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:19,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2021-05-02 14:44:19,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:19,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803390727] [2021-05-02 14:44:19,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:19,287 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:19,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114351003] [2021-05-02 14:44:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:19,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:44:19,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:19,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:19,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:19,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:19,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:19,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:19,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:19,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:19,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:44:19,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:19,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803390727] [2021-05-02 14:44:19,422 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:19,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114351003] [2021-05-02 14:44:19,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114351003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:19,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:19,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 14:44:19,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327551816] [2021-05-02 14:44:19,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:44:19,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:19,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:44:19,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:44:19,423 INFO L87 Difference]: Start difference. First operand 71 states and 96 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) [2021-05-02 14:44:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:19,468 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-02 14:44:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:44:19,470 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 [2021-05-02 14:44:19,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:19,471 INFO L225 Difference]: With dead ends: 111 [2021-05-02 14:44:19,471 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 14:44:19,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:44:19,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 14:44:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-02 14:44:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 14:44:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-02 14:44:19,482 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-02 14:44:19,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:19,482 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-02 14:44:19,482 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) [2021-05-02 14:44:19,482 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-02 14:44:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 14:44:19,483 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:19,483 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:19,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 14:44:19,704 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:19,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:19,705 INFO L82 PathProgramCache]: Analyzing trace with hash 691597660, now seen corresponding path program 1 times [2021-05-02 14:44:19,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:19,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192456455] [2021-05-02 14:44:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:19,729 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:19,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839735479] [2021-05-02 14:44:19,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:19,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:44:19,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:19,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:44:19,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:19,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192456455] [2021-05-02 14:44:19,896 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:19,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839735479] [2021-05-02 14:44:19,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839735479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:19,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:19,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:44:19,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226967814] [2021-05-02 14:44:19,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:44:19,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:19,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:44:19,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:44:19,897 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:44:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:19,964 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2021-05-02 14:44:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:44:19,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2021-05-02 14:44:19,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:19,966 INFO L225 Difference]: With dead ends: 106 [2021-05-02 14:44:19,966 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 14:44:19,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:19,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 14:44:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 14:44:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 14:44:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-02 14:44:19,978 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-02 14:44:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:19,979 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-02 14:44:19,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:44:19,979 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-02 14:44:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 14:44:19,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:19,980 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1] [2021-05-02 14:44:20,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:20,193 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:20,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:20,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2021-05-02 14:44:20,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:20,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615804910] [2021-05-02 14:44:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:20,200 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:20,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133002538] [2021-05-02 14:44:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:20,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 14:44:20,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:20,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:20,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:44:20,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:20,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615804910] [2021-05-02 14:44:20,398 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:20,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133002538] [2021-05-02 14:44:20,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133002538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:20,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:20,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:44:20,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261245319] [2021-05-02 14:44:20,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:44:20,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:20,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:44:20,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:20,400 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:44:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:20,529 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2021-05-02 14:44:20,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:44:20,529 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 14:44:20,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:20,533 INFO L225 Difference]: With dead ends: 118 [2021-05-02 14:44:20,533 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 14:44:20,533 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 14:44:20,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-02 14:44:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 14:44:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-02 14:44:20,548 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-02 14:44:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:20,548 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-02 14:44:20,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:44:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-02 14:44:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 14:44:20,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:20,549 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:20,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:20,761 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:20,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:20,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 1 times [2021-05-02 14:44:20,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:20,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415971154] [2021-05-02 14:44:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:20,768 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:20,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154379795] [2021-05-02 14:44:20,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 14:44:20,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:20,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:20,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:20,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:20,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:20,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:20,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:20,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:20,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:44:21,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:21,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415971154] [2021-05-02 14:44:21,032 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:21,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154379795] [2021-05-02 14:44:21,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154379795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:21,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:21,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:44:21,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056767319] [2021-05-02 14:44:21,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:44:21,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:21,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:44:21,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:21,033 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:44:21,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:21,234 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2021-05-02 14:44:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:44:21,235 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-05-02 14:44:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:21,236 INFO L225 Difference]: With dead ends: 131 [2021-05-02 14:44:21,236 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 14:44:21,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:44:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 14:44:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-02 14:44:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 14:44:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-02 14:44:21,250 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-02 14:44:21,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:21,250 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-02 14:44:21,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:44:21,250 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-02 14:44:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 14:44:21,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:21,251 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:21,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 14:44:21,465 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:21,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:21,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2021-05-02 14:44:21,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:21,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186546778] [2021-05-02 14:44:21,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:21,475 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:21,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9410136] [2021-05-02 14:44:21,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:21,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:44:21,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:21,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 14:44:21,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:21,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-05-02 14:44:21,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:21,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186546778] [2021-05-02 14:44:21,693 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:21,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9410136] [2021-05-02 14:44:21,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9410136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:21,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:21,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:44:21,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284976019] [2021-05-02 14:44:21,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:44:21,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:21,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:44:21,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:21,695 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:44:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:21,819 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2021-05-02 14:44:21,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:44:21,819 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2021-05-02 14:44:21,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:21,821 INFO L225 Difference]: With dead ends: 151 [2021-05-02 14:44:21,821 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 14:44:21,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:21,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 14:44:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 14:44:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 14:44:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-02 14:44:21,836 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-02 14:44:21,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:21,836 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-02 14:44:21,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:44:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-02 14:44:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:44:21,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:21,837 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:22,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:22,059 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:22,060 INFO L82 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 2 times [2021-05-02 14:44:22,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:22,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064104780] [2021-05-02 14:44:22,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:22,067 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:22,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41208662] [2021-05-02 14:44:22,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:22,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:44:22,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 14:44:22,121 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 14:44:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 14:44:22,144 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 14:44:22,253 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 14:44:22,253 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 14:44:22,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:22,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:44:22 BoogieIcfgContainer [2021-05-02 14:44:22,492 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:44:22,492 INFO L168 Benchmark]: Toolchain (without parser) took 6841.94 ms. Allocated memory was 180.4 MB in the beginning and 221.2 MB in the end (delta: 40.9 MB). Free memory was 144.7 MB in the beginning and 125.5 MB in the end (delta: 19.1 MB). Peak memory consumption was 59.2 MB. Max. memory is 8.0 GB. [2021-05-02 14:44:22,492 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 180.4 MB. Free memory is still 161.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:44:22,493 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.16 ms. Allocated memory is still 180.4 MB. Free memory was 144.5 MB in the beginning and 162.9 MB in the end (delta: -18.4 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:44:22,493 INFO L168 Benchmark]: Boogie Preprocessor took 31.48 ms. Allocated memory is still 180.4 MB. Free memory was 162.9 MB in the beginning and 161.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:44:22,493 INFO L168 Benchmark]: RCFGBuilder took 229.64 ms. Allocated memory is still 180.4 MB. Free memory was 161.3 MB in the beginning and 145.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:44:22,493 INFO L168 Benchmark]: TraceAbstraction took 6283.04 ms. Allocated memory was 180.4 MB in the beginning and 221.2 MB in the end (delta: 40.9 MB). Free memory was 145.1 MB in the beginning and 125.5 MB in the end (delta: 19.5 MB). Peak memory consumption was 59.9 MB. Max. memory is 8.0 GB. [2021-05-02 14:44:22,493 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 180.4 MB. Free memory is still 161.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 291.16 ms. Allocated memory is still 180.4 MB. Free memory was 144.5 MB in the beginning and 162.9 MB in the end (delta: -18.4 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.48 ms. Allocated memory is still 180.4 MB. Free memory was 162.9 MB in the beginning and 161.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 229.64 ms. Allocated memory is still 180.4 MB. Free memory was 161.3 MB in the beginning and 145.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6283.04 ms. Allocated memory was 180.4 MB in the beginning and 221.2 MB in the end (delta: 40.9 MB). Free memory was 145.1 MB in the beginning and 125.5 MB in the end (delta: 19.5 MB). Peak memory consumption was 59.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=11, counter=0] [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=4, y=1] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=4, y=1] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=4, b=1, counter=0, p=1, q=0, r=0, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=4, b=1, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=4, y=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=3, b=1, counter=1, p=1, q=0, r=-1, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=1, counter=2, counter++=1, p=1, q=0, r=-1, s=1, x=4, y=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=2, b=1, counter=2, p=1, q=0, r=-2, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, counter=3, counter++=2, p=1, q=0, r=-2, s=1, x=4, y=1] [L34] COND FALSE !(counter++<2) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6204.0ms, OverallIterations: 12, TraceHistogramMax: 7, EmptinessCheckTime: 19.8ms, AutomataDifference: 1274.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 416 SDtfs, 204 SDslu, 1402 SDs, 0 SdLazy, 975 SolverSat, 111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 680.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 380 GetRequests, 303 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 484.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred in iteration=11, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 169.3ms AutomataMinimizationTime, 11 MinimizatonAttempts, 23 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 96.2ms SsaConstructionTime, 324.9ms SatisfiabilityAnalysisTime, 1515.3ms InterpolantComputationTime, 456 NumberOfCodeBlocks, 456 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 384 ConstructedInterpolants, 0 QuantifiedInterpolants, 1412 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1478 ConjunctsInSsa, 184 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 204/236 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...