/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifcompf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:41:51,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:41:51,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:41:51,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:41:51,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:41:51,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:41:51,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:41:51,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:41:51,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:41:51,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:41:51,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:41:51,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:41:51,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:41:51,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:41:51,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:41:51,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:41:51,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:41:51,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:41:51,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:41:51,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:41:51,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:41:51,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:41:51,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:41:51,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:41:51,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:41:51,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:41:51,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:41:51,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:41:51,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:41:51,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:41:51,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:41:51,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:41:51,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:41:51,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:41:51,169 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:41:51,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:41:51,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:41:51,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:41:51,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:41:51,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:41:51,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:41:51,174 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 [2020-10-23 18:41:51,201 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:41:51,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:41:51,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:41:51,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:41:51,204 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:41:51,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:41:51,204 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:41:51,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:41:51,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:41:51,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:41:51,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:41:51,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:41:51,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:41:51,206 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:41:51,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:41:51,206 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:41:51,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:41:51,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:41:51,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:41:51,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:41:51,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:41:51,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:41:51,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:41:51,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:41:51,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:41:51,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:41:51,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:41:51,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:41:51,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:41:51,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:41:51,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:41:51,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:41:51,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:41:51,694 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:41:51,694 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:41:51,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifcompf.c [2020-10-23 18:41:51,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bbc71edc/8ac098f6072941eaab1f9fb19b3f030d/FLAGc1a1570a6 [2020-10-23 18:41:52,405 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:41:52,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifcompf.c [2020-10-23 18:41:52,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bbc71edc/8ac098f6072941eaab1f9fb19b3f030d/FLAGc1a1570a6 [2020-10-23 18:41:52,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bbc71edc/8ac098f6072941eaab1f9fb19b3f030d [2020-10-23 18:41:52,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:41:52,773 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:41:52,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:52,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:41:52,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:41:52,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:52" (1/1) ... [2020-10-23 18:41:52,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10ac07ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:52, skipping insertion in model container [2020-10-23 18:41:52,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:52" (1/1) ... [2020-10-23 18:41:52,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:41:52,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:41:52,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:53,003 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:41:53,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:53,045 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:41:53,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:53 WrapperNode [2020-10-23 18:41:53,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:53,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:41:53,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:41:53,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:41:53,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:53" (1/1) ... [2020-10-23 18:41:53,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:53" (1/1) ... [2020-10-23 18:41:53,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:53" (1/1) ... [2020-10-23 18:41:53,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:53" (1/1) ... [2020-10-23 18:41:53,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:53" (1/1) ... [2020-10-23 18:41:53,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:53" (1/1) ... [2020-10-23 18:41:53,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:53" (1/1) ... [2020-10-23 18:41:53,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:41:53,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:41:53,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:41:53,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:41:53,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:53" (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 [2020-10-23 18:41:53,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:41:53,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:41:53,162 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:41:53,163 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:41:53,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:41:53,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:41:53,163 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:41:53,163 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:41:53,164 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:41:53,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:41:53,164 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:41:53,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:41:53,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:41:53,164 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:41:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:41:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:41:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:41:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:41:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:41:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:41:53,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:41:53,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:41:53,817 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:41:53,818 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-23 18:41:53,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:53 BoogieIcfgContainer [2020-10-23 18:41:53,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:41:53,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:41:53,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:41:53,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:41:53,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:41:52" (1/3) ... [2020-10-23 18:41:53,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f255e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:53, skipping insertion in model container [2020-10-23 18:41:53,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:53" (2/3) ... [2020-10-23 18:41:53,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f255e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:53, skipping insertion in model container [2020-10-23 18:41:53,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:53" (3/3) ... [2020-10-23 18:41:53,835 INFO L111 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2020-10-23 18:41:53,852 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:41:53,860 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:41:53,877 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:41:53,926 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:41:53,927 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:41:53,927 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:41:53,927 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:41:53,927 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:41:53,928 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:41:53,928 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:41:53,928 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:41:53,954 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-23 18:41:53,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:41:53,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:53,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:53,969 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:53,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2130740261, now seen corresponding path program 1 times [2020-10-23 18:41:53,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:53,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993750547] [2020-10-23 18:41:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:54,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:54,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:54,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993750547] [2020-10-23 18:41:54,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:54,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:41:54,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570180769] [2020-10-23 18:41:54,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:41:54,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:54,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:41:54,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:54,396 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-10-23 18:41:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:54,539 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-10-23 18:41:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:41:54,542 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-23 18:41:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:54,552 INFO L225 Difference]: With dead ends: 75 [2020-10-23 18:41:54,552 INFO L226 Difference]: Without dead ends: 36 [2020-10-23 18:41:54,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:54,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-23 18:41:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-23 18:41:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:41:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-23 18:41:54,610 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2020-10-23 18:41:54,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:54,611 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-23 18:41:54,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:41:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-23 18:41:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:41:54,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:54,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:54,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:41:54,614 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:54,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:54,615 INFO L82 PathProgramCache]: Analyzing trace with hash -139633948, now seen corresponding path program 1 times [2020-10-23 18:41:54,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:54,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414337174] [2020-10-23 18:41:54,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:54,643 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:54,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056461565] [2020-10-23 18:41:54,644 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 [2020-10-23 18:41:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:54,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 18:41:54,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:54,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414337174] [2020-10-23 18:41:54,825 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:54,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056461565] [2020-10-23 18:41:54,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:54,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:41:54,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324131006] [2020-10-23 18:41:54,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:41:54,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:54,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:41:54,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:41:54,829 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 4 states. [2020-10-23 18:41:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:54,945 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2020-10-23 18:41:54,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:41:54,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 18:41:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:54,949 INFO L225 Difference]: With dead ends: 69 [2020-10-23 18:41:54,949 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 18:41:54,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:41:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 18:41:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2020-10-23 18:41:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 18:41:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-23 18:41:54,969 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2020-10-23 18:41:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:54,969 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-23 18:41:54,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:41:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-23 18:41:54,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 18:41:54,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:54,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:55,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:41:55,186 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:55,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:55,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1013651816, now seen corresponding path program 1 times [2020-10-23 18:41:55,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:55,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123115774] [2020-10-23 18:41:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:55,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:55,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:41:55,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123115774] [2020-10-23 18:41:55,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:55,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:41:55,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305084651] [2020-10-23 18:41:55,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:41:55,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:55,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:41:55,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:41:55,310 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 4 states. [2020-10-23 18:41:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:55,463 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-10-23 18:41:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:41:55,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-23 18:41:55,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:55,479 INFO L225 Difference]: With dead ends: 74 [2020-10-23 18:41:55,479 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 18:41:55,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:41:55,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 18:41:55,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2020-10-23 18:41:55,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 18:41:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-23 18:41:55,499 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2020-10-23 18:41:55,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:55,499 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-23 18:41:55,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:41:55,500 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-23 18:41:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 18:41:55,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:55,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:55,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:41:55,501 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:55,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:55,502 INFO L82 PathProgramCache]: Analyzing trace with hash 266211862, now seen corresponding path program 1 times [2020-10-23 18:41:55,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:55,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939783112] [2020-10-23 18:41:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:55,526 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:55,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983314943] [2020-10-23 18:41:55,526 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 [2020-10-23 18:41:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:55,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:41:55,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:55,652 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:41:55,652 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:55,656 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:55,656 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:55,657 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-10-23 18:41:55,700 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:55,701 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-10-23 18:41:55,702 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-23 18:41:55,715 INFO L625 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-10-23 18:41:55,715 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:55,715 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-10-23 18:41:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:41:55,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939783112] [2020-10-23 18:41:55,751 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:55,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983314943] [2020-10-23 18:41:55,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:55,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:41:55,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030040441] [2020-10-23 18:41:55,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:41:55,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:55,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:41:55,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:41:55,754 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 7 states. [2020-10-23 18:41:55,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:55,880 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-23 18:41:55,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:41:55,881 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-23 18:41:55,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:55,883 INFO L225 Difference]: With dead ends: 54 [2020-10-23 18:41:55,883 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 18:41:55,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:41:55,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 18:41:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-10-23 18:41:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 18:41:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-23 18:41:55,893 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 34 [2020-10-23 18:41:55,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:55,894 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-23 18:41:55,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:41:55,894 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-23 18:41:55,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 18:41:55,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:55,895 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:56,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:56,109 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:56,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:56,110 INFO L82 PathProgramCache]: Analyzing trace with hash -394265600, now seen corresponding path program 1 times [2020-10-23 18:41:56,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:56,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453107471] [2020-10-23 18:41:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:56,133 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:56,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005100608] [2020-10-23 18:41:56,134 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 [2020-10-23 18:41:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:56,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:41:56,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:41:56,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453107471] [2020-10-23 18:41:56,271 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:56,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005100608] [2020-10-23 18:41:56,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:56,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-23 18:41:56,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368888192] [2020-10-23 18:41:56,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:41:56,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:56,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:41:56,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:41:56,274 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 7 states. [2020-10-23 18:41:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:56,461 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2020-10-23 18:41:56,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:41:56,461 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-23 18:41:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:56,463 INFO L225 Difference]: With dead ends: 115 [2020-10-23 18:41:56,463 INFO L226 Difference]: Without dead ends: 66 [2020-10-23 18:41:56,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:41:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-23 18:41:56,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-23 18:41:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-23 18:41:56,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-23 18:41:56,475 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 42 [2020-10-23 18:41:56,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:56,475 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-23 18:41:56,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:41:56,475 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-23 18:41:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 18:41:56,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:56,477 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:56,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:56,691 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:56,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:56,692 INFO L82 PathProgramCache]: Analyzing trace with hash 339216840, now seen corresponding path program 1 times [2020-10-23 18:41:56,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:56,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974081972] [2020-10-23 18:41:56,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:56,721 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:56,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150205856] [2020-10-23 18:41:56,722 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 [2020-10-23 18:41:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:56,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-23 18:41:56,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:56,888 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2020-10-23 18:41:56,890 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:56,899 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:56,902 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:56,902 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:8 [2020-10-23 18:41:56,927 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:41:56,927 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:56,938 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:56,939 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:56,939 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-10-23 18:41:57,039 INFO L350 Elim1Store]: treesize reduction 34, result has 57.0 percent of original size [2020-10-23 18:41:57,039 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 59 [2020-10-23 18:41:57,041 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:57,084 INFO L625 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2020-10-23 18:41:57,087 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:57,088 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:12 [2020-10-23 18:41:57,113 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-10-23 18:41:57,114 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:57,125 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:57,125 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:57,125 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-10-23 18:41:57,187 INFO L350 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2020-10-23 18:41:57,188 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2020-10-23 18:41:57,189 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:57,199 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:57,205 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 18:41:57,205 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:32 [2020-10-23 18:41:57,499 INFO L350 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2020-10-23 18:41:57,500 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 39 [2020-10-23 18:41:57,501 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:57,517 INFO L625 ElimStorePlain]: treesize reduction 23, result has 32.4 percent of original size [2020-10-23 18:41:57,519 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:57,519 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:7 [2020-10-23 18:41:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:41:57,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974081972] [2020-10-23 18:41:57,586 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:57,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150205856] [2020-10-23 18:41:57,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:57,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-23 18:41:57,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213951031] [2020-10-23 18:41:57,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:41:57,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:57,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:41:57,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:41:57,589 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 16 states. [2020-10-23 18:42:08,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:08,698 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2020-10-23 18:42:08,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 18:42:08,699 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-23 18:42:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:08,700 INFO L225 Difference]: With dead ends: 102 [2020-10-23 18:42:08,701 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 18:42:08,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:42:08,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 18:42:08,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-10-23 18:42:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-23 18:42:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-10-23 18:42:08,734 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 51 [2020-10-23 18:42:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:08,734 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-10-23 18:42:08,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:42:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-10-23 18:42:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 18:42:08,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:08,736 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:42:08,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:08,946 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:08,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:08,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1568136782, now seen corresponding path program 2 times [2020-10-23 18:42:08,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:08,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631587402] [2020-10-23 18:42:08,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:08,990 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:42:08,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232897888] [2020-10-23 18:42:08,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:09,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:42:09,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:42:09,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:42:09,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:42:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-23 18:42:09,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631587402] [2020-10-23 18:42:09,194 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:42:09,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232897888] [2020-10-23 18:42:09,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:42:09,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-23 18:42:09,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428023994] [2020-10-23 18:42:09,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:42:09,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:09,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:42:09,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:42:09,196 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 9 states. [2020-10-23 18:42:09,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:09,667 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2020-10-23 18:42:09,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:42:09,667 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-23 18:42:09,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:09,674 INFO L225 Difference]: With dead ends: 160 [2020-10-23 18:42:09,674 INFO L226 Difference]: Without dead ends: 83 [2020-10-23 18:42:09,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:42:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-23 18:42:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2020-10-23 18:42:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 18:42:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-10-23 18:42:09,708 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 59 [2020-10-23 18:42:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:09,709 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-10-23 18:42:09,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:42:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-10-23 18:42:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-23 18:42:09,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:09,714 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:42:09,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-23 18:42:09,930 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:09,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:09,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1233878934, now seen corresponding path program 3 times [2020-10-23 18:42:09,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:09,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201643743] [2020-10-23 18:42:09,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:09,973 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:42:09,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805435268] [2020-10-23 18:42:09,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:10,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:42:10,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-10-23 18:42:10,177 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:42:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:42:10,247 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:42:10,402 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:42:10,402 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:42:10,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:10,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:42:10 BoogieIcfgContainer [2020-10-23 18:42:10,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:42:10,725 INFO L168 Benchmark]: Toolchain (without parser) took 17956.64 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.7 MB in the beginning and 100.5 MB in the end (delta: 26.2 MB). Peak memory consumption was 58.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:10,725 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:42:10,726 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.17 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:10,727 INFO L168 Benchmark]: Boogie Preprocessor took 42.48 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:10,728 INFO L168 Benchmark]: RCFGBuilder took 730.93 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 95.6 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:10,728 INFO L168 Benchmark]: TraceAbstraction took 16897.89 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 95.2 MB in the beginning and 100.5 MB in the end (delta: -5.3 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:42:10,731 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 271.17 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.48 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 730.93 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 95.6 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16897.89 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 95.2 MB in the beginning and 100.5 MB in the end (delta: -5.3 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=15, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=3] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=3] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=3] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=3] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] i=0 VAL [\old(N)=0, a={-2:0}, b={-4:0}, c={-3:0}, i=0, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-4:0}, malloc(sizeof(long long)*N)={-3:0}, N=3] [L32] COND TRUE i