/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/eqn5f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:41:50,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:41:50,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:41:50,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:41:50,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:41:50,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:41:50,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:41:50,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:41:50,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:41:50,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:41:50,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:41:50,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:41:50,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:41:50,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:41:50,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:41:50,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:41:50,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:41:50,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:41:50,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:41:50,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:41:50,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:41:50,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:41:50,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:41:50,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:41:50,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:41:50,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:41:50,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:41:50,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:41:50,637 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 18:41:50,683 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:41:50,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:41:50,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:41:50,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:41:50,689 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:41:50,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:41:50,689 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:41:50,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:41:50,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:41:50,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:41:50,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:41:50,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:41:50,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:41:50,691 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:41:50,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:41:50,692 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:41:50,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:41:50,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:41:50,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:41:50,692 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:41:50,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:41:50,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:41:50,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:41:50,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:41:50,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:41:50,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:41:50,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:41:50,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:41:50,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:41:50,694 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:41:51,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:41:51,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:41:51,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:41:51,168 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:41:51,169 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:41:51,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn5f.c [2020-10-23 18:41:51,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53bd5e016/57d939ab614549bb81a52304370ef198/FLAG68b4bdc4d [2020-10-23 18:41:51,943 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:41:51,944 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn5f.c [2020-10-23 18:41:51,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53bd5e016/57d939ab614549bb81a52304370ef198/FLAG68b4bdc4d [2020-10-23 18:41:51,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53bd5e016/57d939ab614549bb81a52304370ef198 [2020-10-23 18:41:51,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:41:51,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:41:51,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:51,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:41:51,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:41:51,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:51" (1/1) ... [2020-10-23 18:41:52,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c121fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:51, skipping insertion in model container [2020-10-23 18:41:52,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:51" (1/1) ... [2020-10-23 18:41:52,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:41:52,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:41:52,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:52,220 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:41:52,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:52,283 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:41:52,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:52 WrapperNode [2020-10-23 18:41:52,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:52,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:41:52,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:41:52,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:41:52,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:52" (1/1) ... [2020-10-23 18:41:52,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:52" (1/1) ... [2020-10-23 18:41:52,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:52" (1/1) ... [2020-10-23 18:41:52,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:52" (1/1) ... [2020-10-23 18:41:52,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:52" (1/1) ... [2020-10-23 18:41:52,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:52" (1/1) ... [2020-10-23 18:41:52,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:52" (1/1) ... [2020-10-23 18:41:52,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:41:52,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:41:52,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:41:52,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:41:52,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:52" (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 18:41:52,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:41:52,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:41:52,476 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:41:52,477 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:41:52,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:41:52,478 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:41:52,478 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:41:52,479 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:41:52,479 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:41:52,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:41:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:41:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:41:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:41:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:41:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:41:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:41:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:41:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:41:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:41:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:41:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:41:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:41:52,963 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:41:52,964 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 18:41:52,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:52 BoogieIcfgContainer [2020-10-23 18:41:52,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:41:52,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:41:52,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:41:52,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:41:52,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:41:51" (1/3) ... [2020-10-23 18:41:52,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc32106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:52, skipping insertion in model container [2020-10-23 18:41:52,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:52" (2/3) ... [2020-10-23 18:41:52,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc32106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:52, skipping insertion in model container [2020-10-23 18:41:52,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:52" (3/3) ... [2020-10-23 18:41:52,978 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2020-10-23 18:41:52,992 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:41:52,998 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:41:53,016 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:41:53,060 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:41:53,060 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:41:53,060 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:41:53,061 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:41:53,061 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:41:53,061 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:41:53,061 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:41:53,061 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:41:53,090 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-23 18:41:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:41:53,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:53,102 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] [2020-10-23 18:41:53,102 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:53,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:53,114 INFO L82 PathProgramCache]: Analyzing trace with hash -391571351, now seen corresponding path program 1 times [2020-10-23 18:41:53,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:53,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094266874] [2020-10-23 18:41:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:53,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:53,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:53,430 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 18:41:53,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094266874] [2020-10-23 18:41:53,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:53,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:41:53,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661493900] [2020-10-23 18:41:53,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:41:53,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:53,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:41:53,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:53,456 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-23 18:41:53,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:53,590 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-10-23 18:41:53,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:41:53,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-23 18:41:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:53,601 INFO L225 Difference]: With dead ends: 63 [2020-10-23 18:41:53,601 INFO L226 Difference]: Without dead ends: 30 [2020-10-23 18:41:53,605 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 18:41:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-23 18:41:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-23 18:41:53,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 18:41:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-23 18:41:53,652 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-10-23 18:41:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:53,653 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-23 18:41:53,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:41:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-23 18:41:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:41:53,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:53,654 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] [2020-10-23 18:41:53,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:41:53,655 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:53,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:53,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1402688601, now seen corresponding path program 1 times [2020-10-23 18:41:53,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:53,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136962032] [2020-10-23 18:41:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:53,687 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:53,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255163367] [2020-10-23 18:41:53,704 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 18:41:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:53,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:41:53,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:53,985 INFO L350 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2020-10-23 18:41:53,985 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 1 case distinctions, treesize of input 27 treesize of output 15 [2020-10-23 18:41:53,986 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:53,994 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:54,001 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 18:41:54,002 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2020-10-23 18:41:54,059 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:54,060 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 18:41:54,062 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-23 18:41:54,078 INFO L625 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-10-23 18:41:54,079 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 18:41:54,079 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-10-23 18:41:54,127 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 18:41:54,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136962032] [2020-10-23 18:41:54,129 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:54,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255163367] [2020-10-23 18:41:54,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:54,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:41:54,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518172961] [2020-10-23 18:41:54,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:41:54,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:54,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:41:54,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:41:54,133 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 7 states. [2020-10-23 18:41:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:54,264 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-23 18:41:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:41:54,265 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-23 18:41:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:54,268 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:41:54,269 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 18:41:54,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 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 18:41:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 18:41:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-10-23 18:41:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 18:41:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-23 18:41:54,284 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 23 [2020-10-23 18:41:54,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:54,285 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-23 18:41:54,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:41:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-23 18:41:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:41:54,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:54,286 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 18:41:54,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:41:54,501 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:54,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1243411255, now seen corresponding path program 1 times [2020-10-23 18:41:54,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:54,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156537227] [2020-10-23 18:41:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:54,541 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:54,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804124313] [2020-10-23 18:41:54,541 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 18:41:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:54,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:41:54,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:54,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156537227] [2020-10-23 18:41:54,684 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:54,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804124313] [2020-10-23 18:41:54,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:54,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:41:54,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685534709] [2020-10-23 18:41:54,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:41:54,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:54,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:41:54,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:41:54,686 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 5 states. [2020-10-23 18:41:54,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:54,841 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2020-10-23 18:41:54,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:41:54,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-23 18:41:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:54,845 INFO L225 Difference]: With dead ends: 74 [2020-10-23 18:41:54,845 INFO L226 Difference]: Without dead ends: 60 [2020-10-23 18:41:54,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:41:54,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-23 18:41:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2020-10-23 18:41:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 18:41:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-23 18:41:54,857 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2020-10-23 18:41:54,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:54,857 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-23 18:41:54,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:41:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-23 18:41:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:41:54,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:54,859 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 18:41:55,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:55,074 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:55,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:55,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1651516553, now seen corresponding path program 1 times [2020-10-23 18:41:55,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:55,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814217710] [2020-10-23 18:41:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:55,096 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:55,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103537936] [2020-10-23 18:41:55,097 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 18:41:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:55,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:41:55,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:55,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814217710] [2020-10-23 18:41:55,224 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:55,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103537936] [2020-10-23 18:41:55,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:55,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-23 18:41:55,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227117116] [2020-10-23 18:41:55,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:41:55,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:55,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:41:55,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:41:55,228 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 5 states. [2020-10-23 18:41:55,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:55,368 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-10-23 18:41:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:41:55,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-23 18:41:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:55,371 INFO L225 Difference]: With dead ends: 69 [2020-10-23 18:41:55,373 INFO L226 Difference]: Without dead ends: 57 [2020-10-23 18:41:55,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:41:55,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-23 18:41:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2020-10-23 18:41:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:41:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-23 18:41:55,395 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 25 [2020-10-23 18:41:55,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:55,396 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-23 18:41:55,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:41:55,396 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-23 18:41:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:41:55,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:55,397 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] [2020-10-23 18:41:55,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:55,599 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:55,600 INFO L82 PathProgramCache]: Analyzing trace with hash 385078571, now seen corresponding path program 1 times [2020-10-23 18:41:55,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:55,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822901213] [2020-10-23 18:41:55,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:55,621 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:55,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468523887] [2020-10-23 18:41:55,622 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 18:41:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:55,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-23 18:41:55,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:55,716 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 10 treesize of output 8 [2020-10-23 18:41:55,718 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:55,726 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:55,733 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 27 treesize of output 15 [2020-10-23 18:41:55,733 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:55,742 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:55,743 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:55,743 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-10-23 18:41:55,817 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-10-23 18:41:55,817 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2020-10-23 18:41:55,820 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:55,861 INFO L625 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2020-10-23 18:41:55,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:55,868 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:41:55,869 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-10-23 18:41:55,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:55,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:55,920 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:55,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:56,015 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-10-23 18:41:56,015 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:56,042 INFO L441 ElimStorePlain]: Different costs {12=[|v_#memory_int_15|], 20=[v_prenex_2]} [2020-10-23 18:41:56,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:41:56,056 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-10-23 18:41:56,056 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2020-10-23 18:41:56,058 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:56,104 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:56,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:41:56,139 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-10-23 18:41:56,140 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 85 [2020-10-23 18:41:56,141 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:56,225 INFO L625 ElimStorePlain]: treesize reduction 50, result has 72.2 percent of original size [2020-10-23 18:41:56,234 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2020-10-23 18:41:56,234 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:130 [2020-10-23 18:41:59,048 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 49 [2020-10-23 18:42:01,323 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 18:42:01,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:01,394 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:01,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:01,395 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:01,440 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-10-23 18:42:01,441 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 47 [2020-10-23 18:42:01,443 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:42:01,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:01,458 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:01,500 INFO L350 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2020-10-23 18:42:01,501 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 44 [2020-10-23 18:42:01,505 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-10-23 18:42:01,544 INFO L625 ElimStorePlain]: treesize reduction 27, result has 48.1 percent of original size [2020-10-23 18:42:01,547 INFO L545 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-10-23 18:42:01,548 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:150, output treesize:17 [2020-10-23 18:42:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:42:01,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822901213] [2020-10-23 18:42:01,651 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:42:01,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468523887] [2020-10-23 18:42:01,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:42:01,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-23 18:42:01,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900245376] [2020-10-23 18:42:01,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:42:01,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:01,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:42:01,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2020-10-23 18:42:01,654 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2020-10-23 18:42:13,872 WARN L193 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-23 18:42:22,276 WARN L193 SmtUtils]: Spent 8.22 s on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-23 18:42:28,232 WARN L193 SmtUtils]: Spent 3.71 s on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-23 18:42:33,524 WARN L193 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-23 18:42:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:42,468 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2020-10-23 18:42:42,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:42:42,473 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-23 18:42:42,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:42,475 INFO L225 Difference]: With dead ends: 71 [2020-10-23 18:42:42,475 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 18:42:42,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=46, Invalid=162, Unknown=2, NotChecked=0, Total=210 [2020-10-23 18:42:42,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 18:42:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 47. [2020-10-23 18:42:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:42:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-10-23 18:42:42,493 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 27 [2020-10-23 18:42:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:42,493 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-10-23 18:42:42,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:42:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-10-23 18:42:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:42:42,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:42,500 INFO L422 BasicCegarLoop]: trace histogram [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 18:42:42,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:42,701 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:42,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:42,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1186077363, now seen corresponding path program 2 times [2020-10-23 18:42:42,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:42,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919273728] [2020-10-23 18:42:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:42,758 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:42:42,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560125310] [2020-10-23 18:42:42,759 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 18:42:42,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:42:42,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:42:42,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:42:42,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:42:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:42:42,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919273728] [2020-10-23 18:42:42,913 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:42:42,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560125310] [2020-10-23 18:42:42,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:42:42,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-23 18:42:42,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885049076] [2020-10-23 18:42:42,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:42:42,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:42,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:42:42,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:42:42,916 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 7 states. [2020-10-23 18:42:43,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:43,398 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-10-23 18:42:43,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:42:43,398 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-23 18:42:43,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:43,400 INFO L225 Difference]: With dead ends: 87 [2020-10-23 18:42:43,400 INFO L226 Difference]: Without dead ends: 73 [2020-10-23 18:42:43,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:42:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-23 18:42:43,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-10-23 18:42:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 18:42:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-23 18:42:43,415 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 29 [2020-10-23 18:42:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:43,415 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-23 18:42:43,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:42:43,415 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-23 18:42:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:42:43,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:43,417 INFO L422 BasicCegarLoop]: trace histogram [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 18:42:43,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:42:43,618 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:43,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:43,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1995705613, now seen corresponding path program 3 times [2020-10-23 18:42:43,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:43,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104230549] [2020-10-23 18:42:43,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:43,639 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:42:43,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444300205] [2020-10-23 18:42:43,640 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 18:42:43,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-23 18:42:43,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:42:43,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:42:43,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:42:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:42:43,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104230549] [2020-10-23 18:42:43,806 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:42:43,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444300205] [2020-10-23 18:42:43,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:42:43,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-23 18:42:43,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561449774] [2020-10-23 18:42:43,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:42:43,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:43,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:42:43,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:42:43,811 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2020-10-23 18:42:44,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:44,310 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2020-10-23 18:42:44,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:42:44,313 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-23 18:42:44,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:44,315 INFO L225 Difference]: With dead ends: 82 [2020-10-23 18:42:44,315 INFO L226 Difference]: Without dead ends: 70 [2020-10-23 18:42:44,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 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 18:42:44,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-23 18:42:44,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2020-10-23 18:42:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 18:42:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-23 18:42:44,340 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 29 [2020-10-23 18:42:44,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:44,341 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-23 18:42:44,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:42:44,341 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-23 18:42:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:42:44,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:44,344 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] [2020-10-23 18:42:44,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:44,560 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:44,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:44,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1096400111, now seen corresponding path program 1 times [2020-10-23 18:42:44,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:44,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141572978] [2020-10-23 18:42:44,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:44,580 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:42:44,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111694617] [2020-10-23 18:42:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:44,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:42:44,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:42:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:42:44,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141572978] [2020-10-23 18:42:44,702 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:42:44,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111694617] [2020-10-23 18:42:44,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:42:44,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:42:44,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93702372] [2020-10-23 18:42:44,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:42:44,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:44,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:42:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:42:44,704 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 6 states. [2020-10-23 18:42:44,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:44,936 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-10-23 18:42:44,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:42:44,937 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-23 18:42:44,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:44,939 INFO L225 Difference]: With dead ends: 74 [2020-10-23 18:42:44,939 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 18:42:44,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:42:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 18:42:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-23 18:42:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:42:44,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-23 18:42:44,964 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 31 [2020-10-23 18:42:44,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:44,964 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-23 18:42:44,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:42:44,964 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-23 18:42:44,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:42:44,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:44,970 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:42:45,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:45,171 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:45,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:45,171 INFO L82 PathProgramCache]: Analyzing trace with hash 438283439, now seen corresponding path program 4 times [2020-10-23 18:42:45,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:45,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677500542] [2020-10-23 18:42:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:45,210 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:42:45,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752153570] [2020-10-23 18:42:45,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:45,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:42:45,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:42:45,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-23 18:42:45,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:42:45,304 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 10 treesize of output 8 [2020-10-23 18:42:45,305 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:45,315 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:45,323 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 27 treesize of output 15 [2020-10-23 18:42:45,323 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:45,331 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:45,332 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:42:45,332 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-10-23 18:42:45,514 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-10-23 18:42:45,517 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-10-23 18:42:45,518 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2020-10-23 18:42:45,519 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:45,661 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-10-23 18:42:45,662 INFO L625 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2020-10-23 18:42:45,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:45,664 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:42:45,665 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-10-23 18:42:45,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:45,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:45,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:45,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:45,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:46,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:46,150 INFO L244 Elim1Store]: Index analysis took 276 ms [2020-10-23 18:42:46,269 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-10-23 18:42:46,269 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:46,269 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 143 [2020-10-23 18:42:46,273 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-10-23 18:42:46,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-23 18:42:46,278 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-23 18:42:46,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:42:46,281 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:42:46,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:46,288 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:46,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:46,824 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-23 18:42:46,825 INFO L350 Elim1Store]: treesize reduction 17, result has 92.5 percent of original size [2020-10-23 18:42:46,825 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 63 treesize of output 252 [2020-10-23 18:42:46,828 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-10-23 18:42:46,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-10-23 18:42:46,830 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-10-23 18:42:46,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-10-23 18:42:46,832 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-10-23 18:42:46,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-23 18:42:46,833 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-23 18:42:46,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:42:46,834 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:42:46,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:46,845 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:47,494 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 47 [2020-10-23 18:42:47,495 INFO L625 ElimStorePlain]: treesize reduction 805, result has 14.5 percent of original size [2020-10-23 18:42:47,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:47,505 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 2 xjuncts. [2020-10-23 18:42:47,506 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:121, output treesize:101 [2020-10-23 18:42:47,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:47,708 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-23 18:42:47,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:47,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:47,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:48,257 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-23 18:42:48,260 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-10-23 18:42:48,300 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:48,301 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:48,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:48,322 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:48,394 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:48,414 INFO L244 Elim1Store]: Index analysis took 114 ms [2020-10-23 18:42:48,447 INFO L350 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2020-10-23 18:42:48,448 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 107 [2020-10-23 18:42:48,449 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:48,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:48,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:48,522 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:48,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:48,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:48,676 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:48,772 INFO L244 Elim1Store]: Index analysis took 272 ms [2020-10-23 18:42:48,780 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 64 [2020-10-23 18:42:48,781 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:48,824 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:48,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:48,825 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:48,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:48,837 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2020-10-23 18:42:48,838 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:49,486 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-23 18:42:49,487 INFO L625 ElimStorePlain]: treesize reduction 53, result has 81.4 percent of original size [2020-10-23 18:42:49,488 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2020-10-23 18:42:49,489 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:212, output treesize:232 [2020-10-23 18:42:50,029 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-10-23 18:42:50,032 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 6, 1] term [2020-10-23 18:42:50,032 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-10-23 18:42:50,644 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-23 18:42:50,647 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-10-23 18:42:50,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:50,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:50,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:50,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:50,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:50,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:50,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:50,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:50,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:50,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:50,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:51,695 INFO L244 Elim1Store]: Index analysis took 944 ms [2020-10-23 18:42:51,728 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:51,729 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 109 [2020-10-23 18:42:51,730 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:51,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:51,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:51,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:51,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:51,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:51,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:52,294 INFO L244 Elim1Store]: Index analysis took 482 ms [2020-10-23 18:42:52,473 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-23 18:42:52,474 INFO L350 Elim1Store]: treesize reduction 17, result has 81.7 percent of original size [2020-10-23 18:42:52,474 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 173 [2020-10-23 18:42:52,477 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:52,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:52,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:52,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:52,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:52,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:52,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:52,628 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:52,629 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 99 [2020-10-23 18:42:52,631 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:53,422 WARN L193 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-23 18:42:53,423 INFO L625 ElimStorePlain]: treesize reduction 248, result has 51.1 percent of original size [2020-10-23 18:42:53,450 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 10 dim-0 vars, and 3 xjuncts. [2020-10-23 18:42:53,451 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:274, output treesize:259 [2020-10-23 18:42:57,767 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 101 [2020-10-23 18:43:00,843 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 105 [2020-10-23 18:43:00,852 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-10-23 18:43:00,957 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:43:00,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:00,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:00,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:00,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:00,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:00,972 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:43:01,170 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-10-23 18:43:01,170 INFO L350 Elim1Store]: treesize reduction 10, result has 81.5 percent of original size [2020-10-23 18:43:01,171 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 82 treesize of output 65 [2020-10-23 18:43:01,173 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:43:01,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,178 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:43:01,206 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:43:01,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:01,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:01,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:01,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:01,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:01,233 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:43:01,541 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-23 18:43:01,542 INFO L350 Elim1Store]: treesize reduction 17, result has 84.0 percent of original size [2020-10-23 18:43:01,542 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 88 treesize of output 111 [2020-10-23 18:43:01,544 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-10-23 18:43:01,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-23 18:43:01,545 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-23 18:43:01,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:01,546 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:43:01,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,549 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-23 18:43:01,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:01,549 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:43:01,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:01,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,557 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 1] term [2020-10-23 18:43:01,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,559 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,560 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-23 18:43:01,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:01,561 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:43:01,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,562 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,567 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-23 18:43:01,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:01,568 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:43:01,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:01,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,573 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,576 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 1] term [2020-10-23 18:43:01,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,580 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:43:01,607 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:43:01,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:01,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:01,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:01,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:01,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:43:01,938 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-23 18:43:01,939 INFO L350 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2020-10-23 18:43:01,939 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 94 treesize of output 82 [2020-10-23 18:43:01,943 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:43:01,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:01,947 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:43:02,157 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 27 [2020-10-23 18:43:02,158 INFO L625 ElimStorePlain]: treesize reduction 383, result has 10.1 percent of original size [2020-10-23 18:43:02,164 INFO L545 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:43:02,164 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 13 variables, input treesize:295, output treesize:7 [2020-10-23 18:43:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:02,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677500542] [2020-10-23 18:43:02,581 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:43:02,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752153570] [2020-10-23 18:43:02,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:43:02,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-23 18:43:02,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199862892] [2020-10-23 18:43:02,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:43:02,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:02,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:43:02,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=126, Unknown=1, NotChecked=0, Total=156 [2020-10-23 18:43:02,586 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 13 states. [2020-10-23 18:43:03,630 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-10-23 18:43:06,643 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-10-23 18:43:07,473 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-10-23 18:43:15,891 WARN L193 SmtUtils]: Spent 5.13 s on a formula simplification. DAG size of input: 116 DAG size of output: 116 [2020-10-23 18:43:23,667 WARN L193 SmtUtils]: Spent 6.28 s on a formula simplification. DAG size of input: 132 DAG size of output: 132 [2020-10-23 18:43:30,513 WARN L193 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 134 DAG size of output: 134 [2020-10-23 18:43:45,333 WARN L193 SmtUtils]: Spent 5.64 s on a formula simplification. DAG size of input: 129 DAG size of output: 128 [2020-10-23 18:43:50,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:50,043 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2020-10-23 18:43:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:43:50,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-23 18:43:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:50,051 INFO L225 Difference]: With dead ends: 75 [2020-10-23 18:43:50,051 INFO L226 Difference]: Without dead ends: 72 [2020-10-23 18:43:50,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=73, Invalid=343, Unknown=4, NotChecked=0, Total=420 [2020-10-23 18:43:50,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-23 18:43:50,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2020-10-23 18:43:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-23 18:43:50,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-23 18:43:50,068 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 31 [2020-10-23 18:43:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:50,069 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-23 18:43:50,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:43:50,069 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-23 18:43:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:43:50,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:50,073 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-23 18:43:50,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 18:43:50,280 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:50,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:50,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1919081583, now seen corresponding path program 5 times [2020-10-23 18:43:50,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:50,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192672481] [2020-10-23 18:43:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:50,302 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:43:50,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052344826] [2020-10-23 18:43:50,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:50,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-23 18:43:50,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:50,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:43:50,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:50,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192672481] [2020-10-23 18:43:50,480 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:43:50,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052344826] [2020-10-23 18:43:50,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:43:50,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-23 18:43:50,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952268633] [2020-10-23 18:43:50,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:43:50,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:50,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:43:50,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:43:50,482 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 9 states. [2020-10-23 18:43:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:51,368 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2020-10-23 18:43:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:43:51,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-23 18:43:51,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:51,373 INFO L225 Difference]: With dead ends: 103 [2020-10-23 18:43:51,373 INFO L226 Difference]: Without dead ends: 91 [2020-10-23 18:43:51,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 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 18:43:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-23 18:43:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2020-10-23 18:43:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-23 18:43:51,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-10-23 18:43:51,393 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 33 [2020-10-23 18:43:51,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:51,393 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-10-23 18:43:51,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:43:51,393 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-10-23 18:43:51,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-23 18:43:51,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:51,394 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] [2020-10-23 18:43:51,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:51,596 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:51,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:51,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1824151403, now seen corresponding path program 1 times [2020-10-23 18:43:51,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:51,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549756322] [2020-10-23 18:43:51,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:51,616 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:43:51,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813433389] [2020-10-23 18:43:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:51,690 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:51,717 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:51,752 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:43:51,752 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:43:51,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:52,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:43:52 BoogieIcfgContainer [2020-10-23 18:43:52,020 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:43:52,021 INFO L168 Benchmark]: Toolchain (without parser) took 120037.18 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 106.5 MB in the beginning and 64.5 MB in the end (delta: 42.0 MB). Peak memory consumption was 73.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:52,022 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:43:52,022 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.41 ms. Allocated memory is still 151.0 MB. Free memory was 105.9 MB in the beginning and 134.0 MB in the end (delta: -28.1 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:52,023 INFO L168 Benchmark]: Boogie Preprocessor took 90.36 ms. Allocated memory is still 151.0 MB. Free memory was 134.0 MB in the beginning and 134.5 MB in the end (delta: -497.3 kB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:52,023 INFO L168 Benchmark]: RCFGBuilder took 589.32 ms. Allocated memory is still 151.0 MB. Free memory was 134.5 MB in the beginning and 118.0 MB in the end (delta: 16.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:52,024 INFO L168 Benchmark]: TraceAbstraction took 119052.04 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 117.4 MB in the beginning and 64.5 MB in the end (delta: 52.9 MB). Peak memory consumption was 83.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:52,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 292.41 ms. Allocated memory is still 151.0 MB. Free memory was 105.9 MB in the beginning and 134.0 MB in the end (delta: -28.1 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 90.36 ms. Allocated memory is still 151.0 MB. Free memory was 134.0 MB in the beginning and 134.5 MB in the end (delta: -497.3 kB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 589.32 ms. Allocated memory is still 151.0 MB. Free memory was 134.5 MB in the beginning and 118.0 MB in the end (delta: 16.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 119052.04 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 117.4 MB in the beginning and 64.5 MB in the end (delta: 52.9 MB). Peak memory consumption was 83.9 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)=7, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 1 [L32] b[0] = 1 [L33] i=1 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=1, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-1:0}, N=2] [L33] COND TRUE i