/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/hard2_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:30:09,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:30:09,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:30:09,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 03:30:09,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 03:30:09,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 03:30:09,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 03:30:09,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 03:30:09,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 03:30:09,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 03:30:09,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 03:30:09,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 03:30:09,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:30:09,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:30:09,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:30:09,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:30:09,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:30:09,757 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:30:09,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:30:09,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:30:09,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:30:09,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:30:09,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:30:09,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:30:09,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:30:09,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:30:09,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:30:09,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:30:09,771 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 03:30:09,801 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:30:09,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:30:09,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:30:09,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:30:09,802 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:30:09,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:30:09,803 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:30:09,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:30:09,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:30:09,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:30:09,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:30:09,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:30:09,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:30:09,803 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:30:09,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:30:09,804 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:30:09,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:30:09,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:30:09,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:30:09,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:30:09,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:30:09,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:30:09,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:30:09,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:30:09,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:30:09,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:30:09,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:30:09,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:30:09,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:30:10,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:30:10,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:30:10,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:30:10,034 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:30:10,035 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:30:10,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound2.c [2021-05-06 03:30:10,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d7624e79/1a0047bb01b44b86b3c323dc5debf6d4/FLAG058524bf7 [2021-05-06 03:30:10,427 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:30:10,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound2.c [2021-05-06 03:30:10,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d7624e79/1a0047bb01b44b86b3c323dc5debf6d4/FLAG058524bf7 [2021-05-06 03:30:10,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d7624e79/1a0047bb01b44b86b3c323dc5debf6d4 [2021-05-06 03:30:10,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:30:10,447 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:30:10,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:30:10,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:30:10,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:30:10,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:30:10" (1/1) ... [2021-05-06 03:30:10,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1843f18f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:10, skipping insertion in model container [2021-05-06 03:30:10,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:30:10" (1/1) ... [2021-05-06 03:30:10,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:30:10,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:30:10,555 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/hard2_unwindbound2.c[526,539] [2021-05-06 03:30:10,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:30:10,572 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:30:10,580 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/hard2_unwindbound2.c[526,539] [2021-05-06 03:30:10,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:30:10,603 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:30:10,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:10 WrapperNode [2021-05-06 03:30:10,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:30:10,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:30:10,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:30:10,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:30:10,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:10" (1/1) ... [2021-05-06 03:30:10,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:10" (1/1) ... [2021-05-06 03:30:10,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:10" (1/1) ... [2021-05-06 03:30:10,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:10" (1/1) ... [2021-05-06 03:30:10,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:10" (1/1) ... [2021-05-06 03:30:10,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:10" (1/1) ... [2021-05-06 03:30:10,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:10" (1/1) ... [2021-05-06 03:30:10,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:30:10,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:30:10,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:30:10,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:30:10,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:30:10,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:30:10,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:30:10,737 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:30:10,737 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:30:10,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:30:10,737 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:30:10,737 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:30:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:30:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:30:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:30:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 03:30:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:30:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:30:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:30:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:30:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:30:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:30:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:30:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:30:10,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:30:10,953 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:30:10,953 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:30:10,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:30:10 BoogieIcfgContainer [2021-05-06 03:30:10,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:30:10,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:30:10,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:30:10,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:30:10,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:30:10" (1/3) ... [2021-05-06 03:30:10,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6d88f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:30:10, skipping insertion in model container [2021-05-06 03:30:10,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:10" (2/3) ... [2021-05-06 03:30:10,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6d88f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:30:10, skipping insertion in model container [2021-05-06 03:30:10,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:30:10" (3/3) ... [2021-05-06 03:30:10,959 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound2.c [2021-05-06 03:30:10,963 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:30:10,965 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:30:10,976 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:30:10,990 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:30:10,990 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:30:10,990 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:30:10,991 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:30:10,991 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:30:10,991 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:30:10,991 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:30:10,991 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:30:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 03:30:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 03:30:11,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:11,005 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:11,005 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:11,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 1 times [2021-05-06 03:30:11,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:11,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105971428] [2021-05-06 03:30:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:11,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:30:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:30:11,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:11,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105971428] [2021-05-06 03:30:11,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105971428] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:30:11,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:30:11,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:30:11,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125192595] [2021-05-06 03:30:11,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:30:11,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:11,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:30:11,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:30:11,223 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:30:11,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:11,362 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2021-05-06 03:30:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:30:11,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 03:30:11,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:11,369 INFO L225 Difference]: With dead ends: 57 [2021-05-06 03:30:11,369 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 03:30:11,371 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:30:11,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 03:30:11,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-06 03:30:11,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 03:30:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-05-06 03:30:11,405 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2021-05-06 03:30:11,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:11,405 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-05-06 03:30:11,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:30:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-05-06 03:30:11,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 03:30:11,406 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:11,406 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:11,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:30:11,406 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:11,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:11,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 1 times [2021-05-06 03:30:11,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:11,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974666854] [2021-05-06 03:30:11,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:11,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:30:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:30:11,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:11,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974666854] [2021-05-06 03:30:11,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974666854] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:30:11,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:30:11,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:30:11,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879934198] [2021-05-06 03:30:11,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:30:11,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:11,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:30:11,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:30:11,545 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:30:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:11,779 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-05-06 03:30:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:30:11,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 03:30:11,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:11,782 INFO L225 Difference]: With dead ends: 41 [2021-05-06 03:30:11,782 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 03:30:11,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:30:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 03:30:11,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-05-06 03:30:11,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 03:30:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 03:30:11,797 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2021-05-06 03:30:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:11,797 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 03:30:11,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:30:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 03:30:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 03:30:11,799 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:11,799 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:11,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:30:11,799 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:11,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:11,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 1 times [2021-05-06 03:30:11,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:11,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813206641] [2021-05-06 03:30:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:11,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:30:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:30:11,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:11,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813206641] [2021-05-06 03:30:11,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813206641] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:30:11,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:30:11,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 03:30:11,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967301694] [2021-05-06 03:30:11,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:30:11,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:11,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:30:11,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:30:11,899 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:30:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:12,005 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2021-05-06 03:30:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:30:12,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 03:30:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:12,006 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:30:12,006 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 03:30:12,006 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:30:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 03:30:12,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 03:30:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 03:30:12,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 03:30:12,015 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2021-05-06 03:30:12,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:12,015 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 03:30:12,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:30:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 03:30:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 03:30:12,016 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:12,016 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:12,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:30:12,016 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:12,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:12,017 INFO L82 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 1 times [2021-05-06 03:30:12,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:12,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266740388] [2021-05-06 03:30:12,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:12,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:30:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:12,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-06 03:30:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:30:12,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:12,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266740388] [2021-05-06 03:30:12,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266740388] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:30:12,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:30:12,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:30:12,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764250338] [2021-05-06 03:30:12,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:30:12,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:12,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:30:12,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:30:12,072 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:30:12,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:12,279 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 03:30:12,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:30:12,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-06 03:30:12,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:12,280 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:30:12,280 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 03:30:12,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:30:12,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 03:30:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2021-05-06 03:30:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 03:30:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2021-05-06 03:30:12,285 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2021-05-06 03:30:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:12,285 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2021-05-06 03:30:12,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:30:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2021-05-06 03:30:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 03:30:12,286 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:12,286 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:12,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 03:30:12,286 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:12,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:12,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 1 times [2021-05-06 03:30:12,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:12,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375765192] [2021-05-06 03:30:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:12,293 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:30:12,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311061716] [2021-05-06 03:30:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:30:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:12,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:30:12,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:30:12,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 03:30:12,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:12,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375765192] [2021-05-06 03:30:12,500 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:30:12,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311061716] [2021-05-06 03:30:12,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311061716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:30:12,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:30:12,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:30:12,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225377721] [2021-05-06 03:30:12,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:30:12,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:12,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:30:12,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:30:12,501 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:30:12,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:12,548 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2021-05-06 03:30:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:30:12,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 03:30:12,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:12,550 INFO L225 Difference]: With dead ends: 65 [2021-05-06 03:30:12,550 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 03:30:12,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:30:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 03:30:12,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-06 03:30:12,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 03:30:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 03:30:12,557 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2021-05-06 03:30:12,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:12,558 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 03:30:12,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:30:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 03:30:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 03:30:12,558 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:12,558 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:12,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:30:12,773 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:12,773 INFO L82 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 1 times [2021-05-06 03:30:12,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:12,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524586485] [2021-05-06 03:30:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:12,779 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:30:12,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129751031] [2021-05-06 03:30:12,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:30:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:12,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:30:12,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:30:12,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:12,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:12,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:12,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:12,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:12,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:12,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:12,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:30:12,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:12,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524586485] [2021-05-06 03:30:12,915 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:30:12,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129751031] [2021-05-06 03:30:12,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129751031] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:30:12,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:30:12,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:30:12,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086322152] [2021-05-06 03:30:12,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:30:12,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:12,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:30:12,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:30:12,917 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:30:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:12,938 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-05-06 03:30:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:30:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 03:30:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:12,939 INFO L225 Difference]: With dead ends: 70 [2021-05-06 03:30:12,939 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 03:30:12,939 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:30:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 03:30:12,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-05-06 03:30:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 03:30:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-05-06 03:30:12,944 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2021-05-06 03:30:12,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:12,945 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-05-06 03:30:12,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:30:12,945 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-05-06 03:30:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 03:30:12,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:12,945 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:13,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:30:13,161 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:13,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:13,161 INFO L82 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 1 times [2021-05-06 03:30:13,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:13,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273051327] [2021-05-06 03:30:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:13,167 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:30:13,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461183430] [2021-05-06 03:30:13,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:30:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:13,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:30:13,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:30:13,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:30:13,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:13,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273051327] [2021-05-06 03:30:13,322 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:30:13,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461183430] [2021-05-06 03:30:13,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461183430] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:30:13,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:30:13,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:30:13,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406630294] [2021-05-06 03:30:13,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:30:13,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:13,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:30:13,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:30:13,323 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:30:13,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:13,364 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-05-06 03:30:13,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:30:13,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 03:30:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:13,367 INFO L225 Difference]: With dead ends: 76 [2021-05-06 03:30:13,367 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 03:30:13,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:30:13,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 03:30:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-06 03:30:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:30:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-05-06 03:30:13,384 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2021-05-06 03:30:13,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:13,384 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-05-06 03:30:13,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:30:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-05-06 03:30:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 03:30:13,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:13,391 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:13,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:30:13,612 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:13,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:13,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 1 times [2021-05-06 03:30:13,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:13,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959057741] [2021-05-06 03:30:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:13,618 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:30:13,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350509012] [2021-05-06 03:30:13,618 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 [2021-05-06 03:30:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:13,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:30:13,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:30:13,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:13,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:13,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:13,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:13,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:13,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:13,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:13,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-05-06 03:30:13,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:13,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959057741] [2021-05-06 03:30:13,734 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:30:13,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350509012] [2021-05-06 03:30:13,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350509012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:30:13,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:30:13,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 03:30:13,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933560006] [2021-05-06 03:30:13,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:30:13,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:13,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:30:13,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:30:13,735 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:30:13,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:13,763 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2021-05-06 03:30:13,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:30:13,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-06 03:30:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:13,765 INFO L225 Difference]: With dead ends: 90 [2021-05-06 03:30:13,765 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 03:30:13,765 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:30:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 03:30:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 03:30:13,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:30:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-05-06 03:30:13,771 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 37 [2021-05-06 03:30:13,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:13,771 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-05-06 03:30:13,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:30:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-05-06 03:30:13,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 03:30:13,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:13,771 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:13,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:30:13,989 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:13,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1057559728, now seen corresponding path program 1 times [2021-05-06 03:30:13,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:13,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338944700] [2021-05-06 03:30:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:13,994 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:30:13,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341243838] [2021-05-06 03:30:13,995 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 [2021-05-06 03:30:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:14,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:30:14,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:30:14,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 03:30:14,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:14,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338944700] [2021-05-06 03:30:14,123 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:30:14,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341243838] [2021-05-06 03:30:14,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341243838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:30:14,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:30:14,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:30:14,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902648018] [2021-05-06 03:30:14,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:30:14,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:14,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:30:14,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:30:14,125 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:30:14,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:14,205 INFO L93 Difference]: Finished difference Result 119 states and 162 transitions. [2021-05-06 03:30:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:30:14,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-05-06 03:30:14,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:14,206 INFO L225 Difference]: With dead ends: 119 [2021-05-06 03:30:14,206 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 03:30:14,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:30:14,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 03:30:14,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-05-06 03:30:14,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 03:30:14,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2021-05-06 03:30:14,213 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 40 [2021-05-06 03:30:14,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:14,213 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2021-05-06 03:30:14,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:30:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2021-05-06 03:30:14,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 03:30:14,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:14,214 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:14,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:30:14,429 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:14,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:14,429 INFO L82 PathProgramCache]: Analyzing trace with hash 529029787, now seen corresponding path program 1 times [2021-05-06 03:30:14,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:14,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79212536] [2021-05-06 03:30:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:14,435 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:30:14,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404152149] [2021-05-06 03:30:14,435 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 [2021-05-06 03:30:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 03:30:14,488 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 03:30:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 03:30:14,528 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 03:30:14,580 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 03:30:14,580 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 03:30:14,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:30:14,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 03:30:14 BoogieIcfgContainer [2021-05-06 03:30:14,807 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 03:30:14,807 INFO L168 Benchmark]: Toolchain (without parser) took 4360.30 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 160.6 MB in the beginning and 205.6 MB in the end (delta: -45.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 03:30:14,807 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 195.0 MB. Free memory was 177.3 MB in the beginning and 177.2 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 03:30:14,807 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.53 ms. Allocated memory is still 195.0 MB. Free memory was 160.4 MB in the beginning and 150.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 03:30:14,807 INFO L168 Benchmark]: Boogie Preprocessor took 64.64 ms. Allocated memory is still 195.0 MB. Free memory was 150.6 MB in the beginning and 178.3 MB in the end (delta: -27.7 MB). Peak memory consumption was 5.6 MB. Max. memory is 8.0 GB. [2021-05-06 03:30:14,807 INFO L168 Benchmark]: RCFGBuilder took 280.24 ms. Allocated memory is still 195.0 MB. Free memory was 178.0 MB in the beginning and 162.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 03:30:14,807 INFO L168 Benchmark]: TraceAbstraction took 3851.23 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 161.8 MB in the beginning and 205.6 MB in the end (delta: -43.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 03:30:14,808 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 195.0 MB. Free memory was 177.3 MB in the beginning and 177.2 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 159.53 ms. Allocated memory is still 195.0 MB. Free memory was 160.4 MB in the beginning and 150.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 64.64 ms. Allocated memory is still 195.0 MB. Free memory was 150.6 MB in the beginning and 178.3 MB in the end (delta: -27.7 MB). Peak memory consumption was 5.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 280.24 ms. Allocated memory is still 195.0 MB. Free memory was 178.0 MB in the beginning and 162.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3851.23 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 161.8 MB in the beginning and 205.6 MB in the end (delta: -43.8 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=15, counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [\old(counter)=0, A=1, B=1, counter=0, d=1, p=1, q=0, r=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=1, B=1, counter=1, d=2, p=2, q=0, r=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L38] COND TRUE !(r >= d) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L44] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=3, counter++=2, d=2, p=2, q=0, r=1] [L44] COND FALSE !(counter++<2) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L58] RET __VERIFIER_assert(A == d*q + r) VAL [\old(counter)=0, A=1, B=1, counter=3, d=2, p=2, q=0, r=1] [L59] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L17] 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: 3792.4ms, OverallIterations: 10, TraceHistogramMax: 8, EmptinessCheckTime: 15.0ms, AutomataDifference: 947.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 330 SDtfs, 96 SDslu, 692 SDs, 0 SdLazy, 394 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 406.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 193 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 447.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=9, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 90.6ms AutomataMinimizationTime, 9 MinimizatonAttempts, 22 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 64.4ms SsaConstructionTime, 159.6ms SatisfiabilityAnalysisTime, 796.0ms InterpolantComputationTime, 267 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 205 ConstructedInterpolants, 0 QuantifiedInterpolants, 718 SizeOfPredicates, 7 NumberOfNonLiveVariables, 735 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 128/135 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...