/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/eqn2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:41:47,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:41:47,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:41:47,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:41:47,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:41:47,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:41:47,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:41:47,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:41:47,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:41:47,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:41:47,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:41:47,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:41:47,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:41:47,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:41:47,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:41:47,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:41:47,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:41:47,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:41:47,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:41:47,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:41:47,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:41:47,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:41:47,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:41:47,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:41:47,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:41:47,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:41:47,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:41:47,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:41:47,498 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 18:41:47,525 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:41:47,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:41:47,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:41:47,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:41:47,528 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:41:47,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:41:47,529 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:41:47,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:41:47,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:41:47,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:41:47,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:41:47,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:41:47,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:41:47,530 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:41:47,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:41:47,531 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:41:47,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:41:47,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:41:47,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:41:47,532 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:41:47,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:41:47,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:41:47,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:41:47,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:41:47,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:41:47,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:41:47,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:41:47,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:41:47,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:41:47,534 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:41:47,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:41:47,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:41:47,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:41:47,988 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:41:47,989 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:41:47,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn2f.c [2020-10-23 18:41:48,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/692fa8859/c855217d476c4db1930a430d8162ebb1/FLAGa8c9368fe [2020-10-23 18:41:48,733 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:41:48,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn2f.c [2020-10-23 18:41:48,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/692fa8859/c855217d476c4db1930a430d8162ebb1/FLAGa8c9368fe [2020-10-23 18:41:49,080 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/692fa8859/c855217d476c4db1930a430d8162ebb1 [2020-10-23 18:41:49,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:41:49,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:41:49,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:49,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:41:49,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:41:49,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf1b19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49, skipping insertion in model container [2020-10-23 18:41:49,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:41:49,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:41:49,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:49,331 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:41:49,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:49,374 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:41:49,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49 WrapperNode [2020-10-23 18:41:49,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:49,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:41:49,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:41:49,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:41:49,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (1/1) ... [2020-10-23 18:41:49,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:41:49,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:41:49,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:41:49,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:41:49,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (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 18:41:49,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:41:49,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:41:49,510 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:41:49,510 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:41:49,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:41:49,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:41:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:41:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:41:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:41:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:41:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:41:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:41:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:41:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:41:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:41:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:41:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:41:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:41:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:41:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:41:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:41:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:41:49,975 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:41:49,976 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 18:41:49,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:49 BoogieIcfgContainer [2020-10-23 18:41:49,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:41:49,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:41:49,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:41:49,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:41:49,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:41:49" (1/3) ... [2020-10-23 18:41:49,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c0e7c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:49, skipping insertion in model container [2020-10-23 18:41:49,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:49" (2/3) ... [2020-10-23 18:41:49,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c0e7c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:49, skipping insertion in model container [2020-10-23 18:41:49,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:49" (3/3) ... [2020-10-23 18:41:49,989 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2020-10-23 18:41:50,005 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:41:50,011 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:41:50,032 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:41:50,066 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:41:50,066 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:41:50,066 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:41:50,066 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:41:50,067 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:41:50,067 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:41:50,067 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:41:50,067 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:41:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-23 18:41:50,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:41:50,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:50,095 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 18:41:50,095 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:50,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:50,103 INFO L82 PathProgramCache]: Analyzing trace with hash -391571351, now seen corresponding path program 1 times [2020-10-23 18:41:50,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:50,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031903728] [2020-10-23 18:41:50,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:50,545 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-23 18:41:50,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:50,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:50,594 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 18:41:50,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031903728] [2020-10-23 18:41:50,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:50,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:41:50,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056938665] [2020-10-23 18:41:50,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:41:50,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:50,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:41:50,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:50,624 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-23 18:41:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:50,804 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-10-23 18:41:50,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:41:50,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-23 18:41:50,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:50,815 INFO L225 Difference]: With dead ends: 63 [2020-10-23 18:41:50,815 INFO L226 Difference]: Without dead ends: 30 [2020-10-23 18:41:50,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:50,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-23 18:41:50,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-23 18:41:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 18:41:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-23 18:41:50,872 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-10-23 18:41:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:50,872 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-23 18:41:50,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:41:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-23 18:41:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:41:50,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:50,874 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 18:41:50,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:41:50,875 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:50,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:50,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1402688601, now seen corresponding path program 1 times [2020-10-23 18:41:50,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:50,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944984682] [2020-10-23 18:41:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:50,911 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:50,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497809582] [2020-10-23 18:41:50,912 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 18:41:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:51,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:41:51,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:51,185 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:51,186 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 1 case distinctions, treesize of input 27 treesize of output 39 [2020-10-23 18:41:51,187 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:51,241 INFO L625 ElimStorePlain]: treesize reduction 16, result has 59.0 percent of original size [2020-10-23 18:41:51,252 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 18:41:51,253 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:7 [2020-10-23 18:41:51,325 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:51,326 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 18:41:51,328 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-23 18:41:51,350 INFO L625 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-10-23 18:41:51,351 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 18:41:51,351 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-10-23 18:41:51,428 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 18:41:51,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944984682] [2020-10-23 18:41:51,429 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:51,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497809582] [2020-10-23 18:41:51,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:51,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:41:51,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805698875] [2020-10-23 18:41:51,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:41:51,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:51,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:41:51,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:41:51,434 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 7 states. [2020-10-23 18:41:51,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:51,654 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-23 18:41:51,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:41:51,656 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-23 18:41:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:51,659 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:41:51,659 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 18:41:51,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:41:51,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 18:41:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-10-23 18:41:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 18:41:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-23 18:41:51,677 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 23 [2020-10-23 18:41:51,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:51,678 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-23 18:41:51,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:41:51,678 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-23 18:41:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:41:51,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:51,680 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 18:41:51,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:41:51,896 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:51,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:51,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1243411255, now seen corresponding path program 1 times [2020-10-23 18:41:51,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:51,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5000635] [2020-10-23 18:41:51,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:51,945 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:51,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419217684] [2020-10-23 18:41:51,946 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 18:41:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:52,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:41:52,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:52,125 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 18:41:52,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5000635] [2020-10-23 18:41:52,126 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:52,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419217684] [2020-10-23 18:41:52,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:52,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:41:52,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85462892] [2020-10-23 18:41:52,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:41:52,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:52,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:41:52,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:41:52,129 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 5 states. [2020-10-23 18:41:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:52,337 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2020-10-23 18:41:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:41:52,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-23 18:41:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:52,342 INFO L225 Difference]: With dead ends: 74 [2020-10-23 18:41:52,342 INFO L226 Difference]: Without dead ends: 60 [2020-10-23 18:41:52,343 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 18:41:52,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-23 18:41:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2020-10-23 18:41:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 18:41:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-23 18:41:52,355 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2020-10-23 18:41:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:52,355 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-23 18:41:52,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:41:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-23 18:41:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:41:52,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:52,357 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 18:41:52,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:52,572 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:52,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:52,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1651516553, now seen corresponding path program 1 times [2020-10-23 18:41:52,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:52,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855811803] [2020-10-23 18:41:52,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:52,596 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:52,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400373875] [2020-10-23 18:41:52,597 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 18:41:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:52,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:41:52,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:52,750 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 18:41:52,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855811803] [2020-10-23 18:41:52,751 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:52,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400373875] [2020-10-23 18:41:52,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:52,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-23 18:41:52,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865376248] [2020-10-23 18:41:52,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:41:52,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:52,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:41:52,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:41:52,754 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 5 states. [2020-10-23 18:41:52,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:52,915 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-10-23 18:41:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:41:52,916 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-23 18:41:52,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:52,918 INFO L225 Difference]: With dead ends: 69 [2020-10-23 18:41:52,918 INFO L226 Difference]: Without dead ends: 57 [2020-10-23 18:41:52,919 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 18:41:52,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-23 18:41:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2020-10-23 18:41:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:41:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-23 18:41:52,931 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 25 [2020-10-23 18:41:52,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:52,931 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-23 18:41:52,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:41:52,931 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-23 18:41:52,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:41:52,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:52,933 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 18:41:53,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:53,147 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:53,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:53,148 INFO L82 PathProgramCache]: Analyzing trace with hash 385078571, now seen corresponding path program 1 times [2020-10-23 18:41:53,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:53,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747061647] [2020-10-23 18:41:53,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:53,180 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:53,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455204969] [2020-10-23 18:41:53,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:41:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:53,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-23 18:41:53,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:53,313 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 18:41:53,315 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:53,327 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:53,336 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 18:41:53,337 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:53,351 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:53,351 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 18:41:53,352 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-10-23 18:41:53,458 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-10-23 18:41:53,459 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 18:41:53,461 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:53,541 INFO L625 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2020-10-23 18:41:53,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:53,549 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 18:41:53,549 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-10-23 18:41:53,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:53,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:53,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:53,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:53,706 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-10-23 18:41:53,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:53,759 INFO L441 ElimStorePlain]: Different costs {12=[|v_#memory_int_15|], 20=[v_prenex_2]} [2020-10-23 18:41:53,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:41:53,774 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-10-23 18:41:53,774 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 18:41:53,776 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:53,831 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:41:53,869 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-10-23 18:41:53,870 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 18:41:53,872 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:53,977 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-23 18:41:53,978 INFO L625 ElimStorePlain]: treesize reduction 50, result has 72.2 percent of original size [2020-10-23 18:41:53,989 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 18:41:53,990 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:130 [2020-10-23 18:41:54,776 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-23 18:41:55,860 WARN L193 SmtUtils]: Spent 941.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 18:41:55,868 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:55,912 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:41:55,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:41:55,914 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:41:55,941 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-10-23 18:41:55,941 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 18:41:55,943 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:41:55,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:55,945 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:55,984 INFO L350 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2020-10-23 18:41:55,985 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 18:41:55,987 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-10-23 18:41:56,022 INFO L625 ElimStorePlain]: treesize reduction 27, result has 48.1 percent of original size [2020-10-23 18:41:56,024 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 18:41:56,025 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:150, output treesize:17 [2020-10-23 18:41:56,102 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 18:41:56,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747061647] [2020-10-23 18:41:56,103 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:56,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455204969] [2020-10-23 18:41:56,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:56,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-23 18:41:56,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316991810] [2020-10-23 18:41:56,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:41:56,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:56,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:41:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:41:56,105 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2020-10-23 18:42:01,792 WARN L193 SmtUtils]: Spent 4.86 s on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-23 18:42:07,172 WARN L193 SmtUtils]: Spent 5.31 s on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-23 18:42:10,493 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-23 18:42:14,181 WARN L193 SmtUtils]: Spent 3.38 s on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-23 18:42:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:16,870 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2020-10-23 18:42:16,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:42:16,874 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-23 18:42:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:16,876 INFO L225 Difference]: With dead ends: 71 [2020-10-23 18:42:16,876 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 18:42:16,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:42:16,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 18:42:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 47. [2020-10-23 18:42:16,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:42:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-10-23 18:42:16,892 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 27 [2020-10-23 18:42:16,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:16,892 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-10-23 18:42:16,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:42:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-10-23 18:42:16,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:42:16,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:16,893 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 18:42:17,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:17,095 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:17,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1186077363, now seen corresponding path program 2 times [2020-10-23 18:42:17,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:17,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186737930] [2020-10-23 18:42:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:17,138 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:42:17,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733266776] [2020-10-23 18:42:17,139 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 18:42:17,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:42:17,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:42:17,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:42:17,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:42:17,264 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 18:42:17,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186737930] [2020-10-23 18:42:17,265 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:42:17,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733266776] [2020-10-23 18:42:17,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:42:17,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-23 18:42:17,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890289047] [2020-10-23 18:42:17,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:42:17,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:17,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:42:17,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:42:17,267 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 7 states. [2020-10-23 18:42:17,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:17,558 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-10-23 18:42:17,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:42:17,559 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-23 18:42:17,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:17,561 INFO L225 Difference]: With dead ends: 87 [2020-10-23 18:42:17,561 INFO L226 Difference]: Without dead ends: 73 [2020-10-23 18:42:17,562 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 18:42:17,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-23 18:42:17,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-10-23 18:42:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 18:42:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-23 18:42:17,582 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 29 [2020-10-23 18:42:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:17,585 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-23 18:42:17,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:42:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-23 18:42:17,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:42:17,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:17,587 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 18:42:17,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:42:17,803 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:17,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1995705613, now seen corresponding path program 3 times [2020-10-23 18:42:17,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:17,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228666296] [2020-10-23 18:42:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:17,849 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:42:17,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512697841] [2020-10-23 18:42:17,850 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 18:42:17,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-23 18:42:17,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:42:17,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:42:17,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:42:18,010 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 18:42:18,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228666296] [2020-10-23 18:42:18,011 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:42:18,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512697841] [2020-10-23 18:42:18,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:42:18,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-23 18:42:18,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040635252] [2020-10-23 18:42:18,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:42:18,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:18,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:42:18,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:42:18,013 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2020-10-23 18:42:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:18,320 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2020-10-23 18:42:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:42:18,323 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-23 18:42:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:18,324 INFO L225 Difference]: With dead ends: 82 [2020-10-23 18:42:18,325 INFO L226 Difference]: Without dead ends: 70 [2020-10-23 18:42:18,326 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 18:42:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-23 18:42:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2020-10-23 18:42:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 18:42:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-23 18:42:18,348 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 29 [2020-10-23 18:42:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:18,352 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-23 18:42:18,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:42:18,352 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-23 18:42:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:42:18,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:18,355 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 18:42:18,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:18,570 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:18,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1096400111, now seen corresponding path program 1 times [2020-10-23 18:42:18,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:18,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124469515] [2020-10-23 18:42:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:18,597 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:42:18,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676640432] [2020-10-23 18:42:18,598 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 18:42:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:42:18,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:42:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:42:18,720 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 18:42:18,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124469515] [2020-10-23 18:42:18,721 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:42:18,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676640432] [2020-10-23 18:42:18,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:42:18,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:42:18,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143469855] [2020-10-23 18:42:18,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:42:18,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:18,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:42:18,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:42:18,723 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 6 states. [2020-10-23 18:42:18,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:42:18,895 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-10-23 18:42:18,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:42:18,896 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-23 18:42:18,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:42:18,898 INFO L225 Difference]: With dead ends: 74 [2020-10-23 18:42:18,898 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 18:42:18,899 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 18:42:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 18:42:18,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-23 18:42:18,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:42:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-23 18:42:18,908 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 31 [2020-10-23 18:42:18,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:42:18,908 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-23 18:42:18,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:42:18,909 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-23 18:42:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:42:18,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:42:18,910 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 18:42:19,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:42:19,125 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:42:19,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:42:19,126 INFO L82 PathProgramCache]: Analyzing trace with hash 438283439, now seen corresponding path program 4 times [2020-10-23 18:42:19,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:42:19,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233317423] [2020-10-23 18:42:19,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:42:19,153 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:42:19,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295282255] [2020-10-23 18:42:19,153 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 18:42:19,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:42:19,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:42:19,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-23 18:42:19,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:42:19,244 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 18:42:19,245 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:19,263 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:19,268 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 18:42:19,269 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:19,286 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:19,286 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 18:42:19,287 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-10-23 18:42:19,410 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-10-23 18:42:19,411 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 18:42:19,412 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:19,504 INFO L625 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2020-10-23 18:42:19,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:19,507 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 18:42:19,507 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-10-23 18:42:19,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:19,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:19,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:19,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:19,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:19,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:19,772 INFO L244 Elim1Store]: Index analysis took 143 ms [2020-10-23 18:42:19,853 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:19,854 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 18:42:19,856 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-10-23 18:42:19,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-23 18:42:19,857 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-23 18:42:19,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:42:19,858 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:42:19,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:19,862 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:19,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:20,211 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-23 18:42:20,212 INFO L350 Elim1Store]: treesize reduction 17, result has 92.5 percent of original size [2020-10-23 18:42:20,212 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 18:42:20,215 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-10-23 18:42:20,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-10-23 18:42:20,216 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-10-23 18:42:20,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-10-23 18:42:20,217 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-10-23 18:42:20,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-23 18:42:20,218 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-23 18:42:20,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:42:20,219 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:42:20,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:20,230 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:20,780 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 45 [2020-10-23 18:42:20,781 INFO L625 ElimStorePlain]: treesize reduction 797, result has 14.6 percent of original size [2020-10-23 18:42:20,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:20,793 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 18:42:20,793 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:121, output treesize:101 [2020-10-23 18:42:20,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:20,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:21,001 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:21,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:21,342 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-23 18:42:21,346 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-10-23 18:42:21,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:21,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:21,397 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:21,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:21,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:21,459 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:21,496 INFO L244 Elim1Store]: Index analysis took 116 ms [2020-10-23 18:42:21,499 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 18:42:21,501 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:21,522 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:21,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:21,528 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:21,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:21,534 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:21,566 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:21,596 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 18:42:21,598 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:21,623 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:21,624 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:21,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:21,660 INFO L350 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2020-10-23 18:42:21,661 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 18:42:21,663 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:22,013 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-23 18:42:22,014 INFO L625 ElimStorePlain]: treesize reduction 70, result has 76.6 percent of original size [2020-10-23 18:42:22,015 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 18:42:22,015 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:212, output treesize:229 [2020-10-23 18:42:22,435 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 18:42:22,439 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 6, 1] term [2020-10-23 18:42:22,440 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-10-23 18:42:22,723 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-23 18:42:22,725 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-10-23 18:42:22,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:22,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:22,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:22,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:22,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:22,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:22,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:22,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:22,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:22,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:22,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,246 INFO L244 Elim1Store]: Index analysis took 449 ms [2020-10-23 18:42:23,265 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:23,266 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 18:42:23,269 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:23,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,514 INFO L244 Elim1Store]: Index analysis took 211 ms [2020-10-23 18:42:23,636 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-23 18:42:23,637 INFO L350 Elim1Store]: treesize reduction 17, result has 81.7 percent of original size [2020-10-23 18:42:23,638 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 91 treesize of output 175 [2020-10-23 18:42:23,641 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:23,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:23,707 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:42:23,707 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 75 treesize of output 98 [2020-10-23 18:42:23,709 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:24,183 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-23 18:42:24,184 INFO L625 ElimStorePlain]: treesize reduction 240, result has 52.8 percent of original size [2020-10-23 18:42:24,199 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 18:42:24,199 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:275, output treesize:269 [2020-10-23 18:42:28,507 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 104 [2020-10-23 18:42:31,049 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 108 [2020-10-23 18:42:31,058 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-10-23 18:42:31,148 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:31,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,168 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:31,368 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-23 18:42:31,368 INFO L350 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2020-10-23 18:42:31,370 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 18:42:31,373 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:42:31,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,378 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:42:31,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,382 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:42:31,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,384 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-10-23 18:42:31,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,388 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:31,408 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:31,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,422 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:31,652 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-23 18:42:31,654 INFO L350 Elim1Store]: treesize reduction 17, result has 84.0 percent of original size [2020-10-23 18:42:31,655 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 96 treesize of output 113 [2020-10-23 18:42:31,661 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-10-23 18:42:31,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-23 18:42:31,662 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-23 18:42:31,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:42:31,663 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:42:31,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,666 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 3, 1] term [2020-10-23 18:42:31,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-23 18:42:31,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-23 18:42:31,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:42:31,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,676 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-23 18:42:31,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:42:31,679 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:42:31,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:42:31,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,690 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 3, 1] term [2020-10-23 18:42:31,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-23 18:42:31,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-23 18:42:31,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:42:31,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,703 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-23 18:42:31,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:42:31,705 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:42:31,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,708 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:31,725 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:42:31,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:42:31,815 INFO L350 Elim1Store]: treesize reduction 10, result has 81.5 percent of original size [2020-10-23 18:42:31,815 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 18:42:31,818 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-10-23 18:42:31,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:42:31,822 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:42:32,005 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 27 [2020-10-23 18:42:32,006 INFO L625 ElimStorePlain]: treesize reduction 424, result has 9.2 percent of original size [2020-10-23 18:42:32,011 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 18:42:32,012 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 13 variables, input treesize:303, output treesize:7 [2020-10-23 18:42:32,276 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 18:42:32,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233317423] [2020-10-23 18:42:32,277 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:42:32,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295282255] [2020-10-23 18:42:32,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:42:32,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-23 18:42:32,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271389314] [2020-10-23 18:42:32,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:42:32,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:42:32,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:42:32,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=126, Unknown=1, NotChecked=0, Total=156 [2020-10-23 18:42:32,279 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 13 states. [2020-10-23 18:42:34,939 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-10-23 18:42:37,431 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 38 [2020-10-23 18:42:37,985 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-10-23 18:42:47,000 WARN L193 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 119 DAG size of output: 119 [2020-10-23 18:42:52,473 WARN L193 SmtUtils]: Spent 4.99 s on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2020-10-23 18:42:59,621 WARN L193 SmtUtils]: Spent 4.90 s on a formula simplification. DAG size of input: 137 DAG size of output: 137 [2020-10-23 18:43:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:02,572 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2020-10-23 18:43:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:43:02,578 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-23 18:43:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:02,579 INFO L225 Difference]: With dead ends: 79 [2020-10-23 18:43:02,579 INFO L226 Difference]: Without dead ends: 76 [2020-10-23 18:43:02,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=66, Invalid=312, Unknown=2, NotChecked=0, Total=380 [2020-10-23 18:43:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-23 18:43:02,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2020-10-23 18:43:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-23 18:43:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-23 18:43:02,591 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 31 [2020-10-23 18:43:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:02,592 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-23 18:43:02,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:43:02,592 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-23 18:43:02,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:43:02,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:02,593 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 18:43:02,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 18:43:02,794 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:02,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:02,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1919081583, now seen corresponding path program 5 times [2020-10-23 18:43:02,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:02,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289749438] [2020-10-23 18:43:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:02,822 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:43:02,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752914254] [2020-10-23 18:43:02,822 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 18:43:02,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-23 18:43:02,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:02,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:43:02,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:03,009 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 18:43:03,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289749438] [2020-10-23 18:43:03,009 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:43:03,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752914254] [2020-10-23 18:43:03,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:43:03,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-23 18:43:03,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313140518] [2020-10-23 18:43:03,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:43:03,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:03,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:43:03,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:43:03,012 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 9 states. [2020-10-23 18:43:03,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:03,550 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2020-10-23 18:43:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:43:03,553 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-23 18:43:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:03,555 INFO L225 Difference]: With dead ends: 103 [2020-10-23 18:43:03,555 INFO L226 Difference]: Without dead ends: 91 [2020-10-23 18:43:03,555 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 18:43:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-23 18:43:03,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2020-10-23 18:43:03,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-23 18:43:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-10-23 18:43:03,572 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 33 [2020-10-23 18:43:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:03,572 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-10-23 18:43:03,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:43:03,573 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-10-23 18:43:03,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-23 18:43:03,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:03,579 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 18:43:03,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:03,780 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:03,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:03,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1824151403, now seen corresponding path program 1 times [2020-10-23 18:43:03,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:03,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997322736] [2020-10-23 18:43:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:03,808 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:43:03,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354264076] [2020-10-23 18:43:03,808 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 18:43:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:03,910 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:03,938 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:03,974 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:43:03,975 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:43:04,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:04,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:43:04 BoogieIcfgContainer [2020-10-23 18:43:04,267 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:43:04,268 INFO L168 Benchmark]: Toolchain (without parser) took 75182.14 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 126.2 MB in the beginning and 144.5 MB in the end (delta: -18.3 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:04,268 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:43:04,269 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.14 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 115.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:04,269 INFO L168 Benchmark]: Boogie Preprocessor took 46.13 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 113.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:04,269 INFO L168 Benchmark]: RCFGBuilder took 555.25 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 131.1 MB in the end (delta: -17.5 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:04,270 INFO L168 Benchmark]: TraceAbstraction took 74286.70 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 130.6 MB in the beginning and 144.5 MB in the end (delta: -13.9 MB). Peak memory consumption was 19.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:04,272 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 282.14 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 115.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.13 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 113.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 555.25 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 131.1 MB in the end (delta: -17.5 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 74286.70 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 130.6 MB in the beginning and 144.5 MB in the end (delta: -13.9 MB). Peak memory consumption was 19.2 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] = 8 [L32] b[0] = 1 [L34] i=1 VAL [\old(N)=0, a={-2:0}, b={-1:0}, i=1, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={-2:0}, N=2] [L34] COND TRUE i