/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-DelaySleep-NoLbe-Random7777.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth06.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d310483fe8b4879eee5de19363f50e4b839cc4ec-d310483 [2021-06-24 19:32:25,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-24 19:32:25,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-24 19:32:25,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-24 19:32:25,664 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-DelaySleep-NoLbe-Random7777.epf [2021-06-24 19:32:25,716 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-24 19:32:25,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-24 19:32:25,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-24 19:32:25,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-24 19:32:25,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-24 19:32:25,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-24 19:32:25,719 INFO L138 SettingsManager]: * Use SBE=true [2021-06-24 19:32:25,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-24 19:32:25,719 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-24 19:32:25,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-24 19:32:25,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-24 19:32:25,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-24 19:32:25,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-24 19:32:25,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-24 19:32:25,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-24 19:32:25,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-24 19:32:25,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-24 19:32:25,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-24 19:32:25,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-24 19:32:25,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-24 19:32:25,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-24 19:32:25,721 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-24 19:32:25,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-24 19:32:25,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 19:32:25,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-24 19:32:25,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-24 19:32:25,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-24 19:32:25,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-24 19:32:25,722 INFO L138 SettingsManager]: * DFS Order used in POR=RANDOM [2021-06-24 19:32:25,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-24 19:32:25,722 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-24 19:32:25,722 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-06-24 19:32:25,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-24 19:32:25,723 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-06-24 19:32:25,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-06-24 19:32:25,723 INFO L138 SettingsManager]: * Random seed used by POR DFS order=7777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-24 19:32:26,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-24 19:32:26,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-24 19:32:26,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-24 19:32:26,023 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-24 19:32:26,024 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-24 19:32:26,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth06.bpl [2021-06-24 19:32:26,025 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/bluetooth06.bpl' [2021-06-24 19:32:26,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-24 19:32:26,053 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-24 19:32:26,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-24 19:32:26,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-24 19:32:26,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-24 19:32:26,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bluetooth06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 07:32:26" (1/1) ... [2021-06-24 19:32:26,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bluetooth06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 07:32:26" (1/1) ... [2021-06-24 19:32:26,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-24 19:32:26,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-24 19:32:26,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-24 19:32:26,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-24 19:32:26,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 07:32:26" (1/1) ... [2021-06-24 19:32:26,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 07:32:26" (1/1) ... [2021-06-24 19:32:26,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 07:32:26" (1/1) ... [2021-06-24 19:32:26,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 07:32:26" (1/1) ... [2021-06-24 19:32:26,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 07:32:26" (1/1) ... [2021-06-24 19:32:26,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 07:32:26" (1/1) ... [2021-06-24 19:32:26,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 07:32:26" (1/1) ... [2021-06-24 19:32:26,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-24 19:32:26,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-24 19:32:26,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-24 19:32:26,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-24 19:32:26,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 07:32:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-24 19:32:26,156 INFO L124 BoogieDeclarations]: Specification and implementation of procedure DeviceThread given in one single declaration [2021-06-24 19:32:26,157 INFO L130 BoogieDeclarations]: Found specification of procedure DeviceThread [2021-06-24 19:32:26,157 INFO L138 BoogieDeclarations]: Found implementation of procedure DeviceThread [2021-06-24 19:32:26,157 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ServerThread given in one single declaration [2021-06-24 19:32:26,157 INFO L130 BoogieDeclarations]: Found specification of procedure ServerThread [2021-06-24 19:32:26,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ServerThread [2021-06-24 19:32:26,157 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-24 19:32:26,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-24 19:32:26,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-24 19:32:26,158 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-24 19:32:26,404 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-24 19:32:26,404 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-06-24 19:32:26,404 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: DeviceThreadEXIT is neither atomic block end nor error location. [2021-06-24 19:32:26,406 INFO L202 PluginConnector]: Adding new model bluetooth06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 07:32:26 BoogieIcfgContainer [2021-06-24 19:32:26,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-24 19:32:26,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-24 19:32:26,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-24 19:32:26,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-24 19:32:26,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.06 07:32:26" (1/2) ... [2021-06-24 19:32:26,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c52ad2 and model type bluetooth06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 07:32:26, skipping insertion in model container [2021-06-24 19:32:26,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 07:32:26" (2/2) ... [2021-06-24 19:32:26,412 INFO L111 eAbstractionObserver]: Analyzing ICFG bluetooth06.bpl [2021-06-24 19:32:26,437 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-24 19:32:26,438 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-24 19:32:26,438 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-24 19:32:26,439 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-24 19:32:26,518 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-24 19:32:26,551 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-24 19:32:26,602 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 19:32:26,603 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 19:32:26,603 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 19:32:26,603 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 19:32:26,603 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 19:32:26,603 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 19:32:26,603 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 19:32:26,603 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork6======== [2021-06-24 19:32:26,727 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:32:26,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:32:26,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1591606953, now seen corresponding path program 1 times [2021-06-24 19:32:26,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:32:26,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604801487] [2021-06-24 19:32:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:32:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:32:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 19:32:26,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:32:26,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604801487] [2021-06-24 19:32:26,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604801487] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 19:32:26,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 19:32:26,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 19:32:26,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341082045] [2021-06-24 19:32:26,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 19:32:26,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:32:26,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 19:32:26,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 19:32:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:32:26,871 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:32:26,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:32:26,876 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:32:27,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:27,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-24 19:32:27,113 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:32:27,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:32:27,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1867971459, now seen corresponding path program 1 times [2021-06-24 19:32:27,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:32:27,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044039476] [2021-06-24 19:32:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:32:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:32:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 19:32:27,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:32:27,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044039476] [2021-06-24 19:32:27,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044039476] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 19:32:27,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 19:32:27,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 19:32:27,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175512266] [2021-06-24 19:32:27,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 19:32:27,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:32:27,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 19:32:27,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 19:32:27,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:32:27,131 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:32:27,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:32:27,132 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:27,132 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:32:27,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:27,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:27,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-24 19:32:27,267 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:32:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:32:27,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1464701258, now seen corresponding path program 1 times [2021-06-24 19:32:27,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:32:27,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414901033] [2021-06-24 19:32:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:32:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:32:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-24 19:32:27,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:32:27,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414901033] [2021-06-24 19:32:27,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414901033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:32:27,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58138256] [2021-06-24 19:32:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:32:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:32:27,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-24 19:32:27,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:32:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-24 19:32:27,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58138256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:32:27,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:32:27,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-24 19:32:27,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914862298] [2021-06-24 19:32:27,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-24 19:32:27,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:32:27,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-24 19:32:27,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-24 19:32:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:32:27,683 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:32:27,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:32:27,683 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:27,683 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:27,683 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:32:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-24 19:32:28,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:32:28,403 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:32:28,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:32:28,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1849103556, now seen corresponding path program 1 times [2021-06-24 19:32:28,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:32:28,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668937598] [2021-06-24 19:32:28,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:32:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:32:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-24 19:32:28,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:32:28,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668937598] [2021-06-24 19:32:28,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668937598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:32:28,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262281024] [2021-06-24 19:32:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:32:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:32:28,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-24 19:32:28,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:32:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-24 19:32:28,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262281024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:32:28,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:32:28,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-24 19:32:28,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122727419] [2021-06-24 19:32:28,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 19:32:28,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:32:28,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 19:32:28,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 19:32:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:32:28,810 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:32:28,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:32:28,810 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:28,810 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:28,810 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 11 states. [2021-06-24 19:32:28,810 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:32:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-24 19:32:31,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:32:31,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:32:31,261 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:32:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:32:31,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1097315628, now seen corresponding path program 1 times [2021-06-24 19:32:31,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:32:31,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812127742] [2021-06-24 19:32:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:32:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:32:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-24 19:32:31,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:32:31,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812127742] [2021-06-24 19:32:31,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812127742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:32:31,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418630400] [2021-06-24 19:32:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:32:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:32:31,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-24 19:32:31,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:32:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-24 19:32:31,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418630400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:32:31,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:32:31,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-24 19:32:31,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567148805] [2021-06-24 19:32:31,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-24 19:32:31,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:32:31,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-24 19:32:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 19:32:31,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:32:31,653 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:32:31,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:32:31,653 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:31,653 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:31,653 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 11 states. [2021-06-24 19:32:31,653 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:32:31,653 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:32:43,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-24 19:32:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:32:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-24 19:32:44,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:32:44,069 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:32:44,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:32:44,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1050099768, now seen corresponding path program 1 times [2021-06-24 19:32:44,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:32:44,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563666091] [2021-06-24 19:32:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:32:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:32:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-24 19:32:44,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:32:44,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563666091] [2021-06-24 19:32:44,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563666091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:32:44,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754595162] [2021-06-24 19:32:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:32:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:32:44,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 79 conjunts are in the unsatisfiable core [2021-06-24 19:32:44,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:32:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-24 19:32:44,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754595162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:32:44,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:32:44,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-24 19:32:44,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534594323] [2021-06-24 19:32:44,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-24 19:32:44,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:32:44,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-24 19:32:44,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-24 19:32:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:32:44,479 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:32:44,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 18 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:32:44,479 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:44,479 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:32:44,479 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 11 states. [2021-06-24 19:32:44,479 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:32:44,479 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-06-24 19:32:44,480 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:09,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:09,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-24 19:33:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:33:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-24 19:33:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-24 19:33:09,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:33:09,411 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork6 was SAFE (1/7) [2021-06-24 19:33:09,412 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-24 19:33:09,417 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 19:33:09,417 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 19:33:09,417 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 19:33:09,417 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 19:33:09,417 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 19:33:09,417 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 19:33:09,417 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 19:33:09,417 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-24 19:33:15,548 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (2/7) [2021-06-24 19:33:15,548 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-24 19:33:15,562 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 19:33:15,562 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 19:33:15,562 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 19:33:15,562 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 19:33:15,562 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 19:33:15,562 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 19:33:15,562 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 19:33:15,562 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork4======== [2021-06-24 19:33:15,588 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:33:15,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:33:15,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2124297675, now seen corresponding path program 1 times [2021-06-24 19:33:15,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:33:15,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874195808] [2021-06-24 19:33:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:33:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 19:33:15,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:33:15,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874195808] [2021-06-24 19:33:15,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874195808] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 19:33:15,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 19:33:15,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 19:33:15,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135955609] [2021-06-24 19:33:15,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 19:33:15,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:33:15,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 19:33:15,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 19:33:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:15,604 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:33:15,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:33:15,604 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:15,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:15,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-24 19:33:15,656 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:33:15,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:33:15,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1891161441, now seen corresponding path program 1 times [2021-06-24 19:33:15,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:33:15,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334399698] [2021-06-24 19:33:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:33:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 19:33:15,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:33:15,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334399698] [2021-06-24 19:33:15,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334399698] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 19:33:15,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 19:33:15,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-24 19:33:15,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324820921] [2021-06-24 19:33:15,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 19:33:15,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:33:15,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 19:33:15,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 19:33:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:15,669 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:33:15,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:33:15,669 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:15,669 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:15,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-24 19:33:15,725 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:33:15,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:33:15,725 INFO L82 PathProgramCache]: Analyzing trace with hash -370090415, now seen corresponding path program 1 times [2021-06-24 19:33:15,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:33:15,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544559508] [2021-06-24 19:33:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:33:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-24 19:33:15,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:33:15,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544559508] [2021-06-24 19:33:15,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544559508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:33:15,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262971137] [2021-06-24 19:33:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:33:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:15,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-24 19:33:15,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:33:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-24 19:33:15,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262971137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:33:15,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:33:15,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-24 19:33:15,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551315825] [2021-06-24 19:33:15,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 19:33:15,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:33:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 19:33:15,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 19:33:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:15,888 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:33:15,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:33:15,888 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:15,888 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:15,888 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 19:33:16,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-24 19:33:16,237 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:33:16,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:33:16,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2137989286, now seen corresponding path program 1 times [2021-06-24 19:33:16,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:33:16,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818949118] [2021-06-24 19:33:16,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:33:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-24 19:33:16,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:33:16,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818949118] [2021-06-24 19:33:16,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818949118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:33:16,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813828076] [2021-06-24 19:33:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:33:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:16,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-24 19:33:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:33:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-24 19:33:16,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813828076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:33:16,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:33:16,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-24 19:33:16,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937982561] [2021-06-24 19:33:16,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 19:33:16,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:33:16,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 19:33:16,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 19:33:16,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:16,423 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:33:16,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:33:16,423 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:16,423 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:16,423 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-24 19:33:16,423 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 19:33:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:33:18,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:33:18,061 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:33:18,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:33:18,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1064738483, now seen corresponding path program 1 times [2021-06-24 19:33:18,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:33:18,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413250920] [2021-06-24 19:33:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:33:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-24 19:33:18,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:33:18,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413250920] [2021-06-24 19:33:18,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413250920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:33:18,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112585365] [2021-06-24 19:33:18,124 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 [2021-06-24 19:33:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:18,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-24 19:33:18,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:33:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-24 19:33:18,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112585365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:33:18,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:33:18,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-24 19:33:18,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867769756] [2021-06-24 19:33:18,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-24 19:33:18,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:33:18,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-24 19:33:18,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2021-06-24 19:33:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:18,237 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:33:18,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:33:18,237 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:18,238 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:18,238 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-24 19:33:18,238 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:33:18,238 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 19:33:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:33:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-24 19:33:30,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-24 19:33:30,060 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:33:30,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:33:30,060 INFO L82 PathProgramCache]: Analyzing trace with hash 826690836, now seen corresponding path program 1 times [2021-06-24 19:33:30,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:33:30,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834019571] [2021-06-24 19:33:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:33:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-24 19:33:30,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:33:30,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834019571] [2021-06-24 19:33:30,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834019571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:33:30,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882635977] [2021-06-24 19:33:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:33:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:30,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 79 conjunts are in the unsatisfiable core [2021-06-24 19:33:30,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:33:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-24 19:33:30,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882635977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:33:30,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:33:30,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-24 19:33:30,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949355863] [2021-06-24 19:33:30,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-24 19:33:30,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:33:30,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-24 19:33:30,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-24 19:33:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:30,487 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:33:30,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.0) internal successors, (114), 18 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:33:30,487 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:30,487 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:30,487 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-24 19:33:30,487 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:33:30,487 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-06-24 19:33:30,487 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:52,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 19:33:52,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:33:52,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-24 19:33:52,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-24 19:33:52,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-24 19:33:52,830 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork4 was SAFE (3/7) [2021-06-24 19:33:52,831 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-24 19:33:52,845 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 19:33:52,845 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 19:33:52,845 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 19:33:52,845 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 19:33:52,845 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 19:33:52,845 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 19:33:52,845 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 19:33:52,845 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork5======== [2021-06-24 19:33:52,880 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:33:52,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:33:52,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1391186690, now seen corresponding path program 1 times [2021-06-24 19:33:52,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:33:52,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741383362] [2021-06-24 19:33:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:33:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 19:33:52,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:33:52,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741383362] [2021-06-24 19:33:52,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741383362] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 19:33:52,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 19:33:52,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 19:33:52,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364807189] [2021-06-24 19:33:52,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 19:33:52,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:33:52,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 19:33:52,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 19:33:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:52,891 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:33:52,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:33:52,891 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:52,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:52,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-24 19:33:52,937 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:33:52,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:33:52,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1790384042, now seen corresponding path program 1 times [2021-06-24 19:33:52,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:33:52,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273507911] [2021-06-24 19:33:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:33:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 19:33:52,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:33:52,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273507911] [2021-06-24 19:33:52,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273507911] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 19:33:52,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 19:33:52,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 19:33:52,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585244882] [2021-06-24 19:33:52,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 19:33:52,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:33:52,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 19:33:52,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 19:33:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:52,950 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:33:52,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:33:52,950 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:52,950 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:53,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-24 19:33:53,001 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:33:53,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:33:53,001 INFO L82 PathProgramCache]: Analyzing trace with hash -822026542, now seen corresponding path program 1 times [2021-06-24 19:33:53,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:33:53,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702012762] [2021-06-24 19:33:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:33:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-24 19:33:53,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:33:53,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702012762] [2021-06-24 19:33:53,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702012762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:33:53,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947851301] [2021-06-24 19:33:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:33:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:53,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-24 19:33:53,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:33:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-24 19:33:53,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947851301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:33:53,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:33:53,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-24 19:33:53,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169352452] [2021-06-24 19:33:53,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-24 19:33:53,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:33:53,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-24 19:33:53,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-24 19:33:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:53,183 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:33:53,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:33:53,183 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:53,183 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:53,183 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-24 19:33:53,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-06-24 19:33:53,591 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:33:53,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:33:53,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1153841500, now seen corresponding path program 1 times [2021-06-24 19:33:53,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:33:53,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337002099] [2021-06-24 19:33:53,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:33:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-24 19:33:53,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:33:53,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337002099] [2021-06-24 19:33:53,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337002099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:33:53,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754593577] [2021-06-24 19:33:53,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:33:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:53,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-24 19:33:53,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:33:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-24 19:33:53,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754593577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:33:53,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:33:53,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-24 19:33:53,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923476649] [2021-06-24 19:33:53,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-24 19:33:53,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:33:53,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-24 19:33:53,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2021-06-24 19:33:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:53,844 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:33:53,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:33:53,844 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:53,844 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:53,844 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 11 states. [2021-06-24 19:33:53,844 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:55,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-24 19:33:55,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:33:55,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:33:55,752 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:33:55,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:33:55,752 INFO L82 PathProgramCache]: Analyzing trace with hash 279312298, now seen corresponding path program 1 times [2021-06-24 19:33:55,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:33:55,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680964077] [2021-06-24 19:33:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:33:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-24 19:33:55,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:33:55,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680964077] [2021-06-24 19:33:55,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680964077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:33:55,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773734417] [2021-06-24 19:33:55,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:33:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:33:55,864 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-24 19:33:55,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:33:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-24 19:33:56,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773734417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:33:56,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:33:56,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-24 19:33:56,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780792583] [2021-06-24 19:33:56,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-24 19:33:56,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:33:56,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-24 19:33:56,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-24 19:33:56,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:33:56,018 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:33:56,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:33:56,018 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:56,018 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:33:56,019 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 11 states. [2021-06-24 19:33:56,019 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:33:56,019 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:34:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-24 19:34:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:34:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-24 19:34:08,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-24 19:34:08,884 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:34:08,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:34:08,885 INFO L82 PathProgramCache]: Analyzing trace with hash -564883244, now seen corresponding path program 1 times [2021-06-24 19:34:08,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:34:08,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702163516] [2021-06-24 19:34:08,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:34:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:34:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-24 19:34:08,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:34:08,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702163516] [2021-06-24 19:34:08,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702163516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:34:08,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164609656] [2021-06-24 19:34:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:34:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:34:09,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-24 19:34:09,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:34:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-24 19:34:09,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164609656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:34:09,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:34:09,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-24 19:34:09,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382237822] [2021-06-24 19:34:09,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-24 19:34:09,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:34:09,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-24 19:34:09,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-24 19:34:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:34:09,238 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:34:09,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 18 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:34:09,239 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:09,239 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:09,239 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 11 states. [2021-06-24 19:34:09,239 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:34:09,239 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 15 states. [2021-06-24 19:34:09,239 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:34:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-24 19:34:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-24 19:34:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-24 19:34:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-24 19:34:29,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:34:29,789 INFO L301 ceAbstractionStarter]: Result for error location DeviceThreadThread1of1ForFork5 was SAFE (4/7) [2021-06-24 19:34:29,789 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-24 19:34:29,794 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-24 19:34:29,794 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-24 19:34:29,794 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-24 19:34:29,794 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-24 19:34:29,794 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-24 19:34:29,794 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-24 19:34:29,794 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-24 19:34:29,795 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DeviceThreadThread1of1ForFork2======== [2021-06-24 19:34:29,807 INFO L430 AbstractCegarLoop]: === Iteration 1 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:34:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:34:29,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1484680645, now seen corresponding path program 1 times [2021-06-24 19:34:29,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:34:29,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513661561] [2021-06-24 19:34:29,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:34:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:34:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 19:34:29,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:34:29,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513661561] [2021-06-24 19:34:29,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513661561] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 19:34:29,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 19:34:29,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 19:34:29,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337171497] [2021-06-24 19:34:29,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 19:34:29,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:34:29,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 19:34:29,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 19:34:29,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:34:29,822 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:34:29,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:34:29,822 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:34:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:29,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-24 19:34:29,886 INFO L430 AbstractCegarLoop]: === Iteration 2 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:34:29,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:34:29,886 INFO L82 PathProgramCache]: Analyzing trace with hash -443389150, now seen corresponding path program 1 times [2021-06-24 19:34:29,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:34:29,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642979732] [2021-06-24 19:34:29,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:34:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:34:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 19:34:29,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:34:29,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642979732] [2021-06-24 19:34:29,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642979732] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 19:34:29,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 19:34:29,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-24 19:34:29,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037329812] [2021-06-24 19:34:29,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-24 19:34:29,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:34:29,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-24 19:34:29,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-24 19:34:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:34:29,892 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:34:29,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:34:29,892 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:29,892 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:34:29,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:29,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:29,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-24 19:34:29,928 INFO L430 AbstractCegarLoop]: === Iteration 3 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:34:29,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:34:29,928 INFO L82 PathProgramCache]: Analyzing trace with hash 585708598, now seen corresponding path program 1 times [2021-06-24 19:34:29,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:34:29,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888453472] [2021-06-24 19:34:29,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:34:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:34:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 19:34:29,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:34:29,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888453472] [2021-06-24 19:34:29,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888453472] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-24 19:34:29,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-24 19:34:29,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-24 19:34:29,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083953784] [2021-06-24 19:34:29,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-24 19:34:29,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:34:29,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-24 19:34:29,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-06-24 19:34:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:34:29,954 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:34:29,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:34:29,954 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:29,954 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:29,954 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:34:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:30,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:30,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 19:34:30,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-24 19:34:30,068 INFO L430 AbstractCegarLoop]: === Iteration 4 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:34:30,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:34:30,068 INFO L82 PathProgramCache]: Analyzing trace with hash 908854657, now seen corresponding path program 1 times [2021-06-24 19:34:30,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:34:30,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748401403] [2021-06-24 19:34:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:34:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:34:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 19:34:30,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:34:30,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748401403] [2021-06-24 19:34:30,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748401403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:34:30,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120238526] [2021-06-24 19:34:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:34:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:34:30,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-24 19:34:30,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:34:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-24 19:34:30,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120238526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:34:30,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:34:30,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-24 19:34:30,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508616863] [2021-06-24 19:34:30,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-24 19:34:30,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:34:30,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-24 19:34:30,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-06-24 19:34:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:34:30,205 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:34:30,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:34:30,206 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:30,206 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:30,206 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-24 19:34:30,206 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:34:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 19:34:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 19:34:30,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-24 19:34:30,604 INFO L430 AbstractCegarLoop]: === Iteration 5 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:34:30,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:34:30,604 INFO L82 PathProgramCache]: Analyzing trace with hash -265742775, now seen corresponding path program 1 times [2021-06-24 19:34:30,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:34:30,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277174251] [2021-06-24 19:34:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:34:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:34:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-24 19:34:30,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:34:30,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277174251] [2021-06-24 19:34:30,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277174251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:34:30,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428573079] [2021-06-24 19:34:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:34:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:34:30,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-24 19:34:30,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:34:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-24 19:34:30,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428573079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:34:30,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:34:30,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-24 19:34:30,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36587653] [2021-06-24 19:34:30,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-24 19:34:30,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:34:30,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-24 19:34:30,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-24 19:34:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:34:30,758 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:34:30,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:34:30,758 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:30,758 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:30,758 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-24 19:34:30,758 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-24 19:34:30,758 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:34:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-24 19:34:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-24 19:34:32,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-24 19:34:32,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:34:32,412 INFO L430 AbstractCegarLoop]: === Iteration 6 === [DeviceThreadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-24 19:34:32,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-24 19:34:32,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1031983640, now seen corresponding path program 1 times [2021-06-24 19:34:32,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-24 19:34:32,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459269436] [2021-06-24 19:34:32,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-24 19:34:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:34:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-24 19:34:32,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-24 19:34:32,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459269436] [2021-06-24 19:34:32,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459269436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:34:32,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061035989] [2021-06-24 19:34:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-24 19:34:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-24 19:34:32,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-24 19:34:32,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-24 19:34:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-24 19:34:32,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061035989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-24 19:34:32,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-24 19:34:32,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-24 19:34:32,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571862912] [2021-06-24 19:34:32,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-24 19:34:32,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-24 19:34:32,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-24 19:34:32,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-24 19:34:32,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-24 19:34:32,675 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-24 19:34:32,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-24 19:34:32,675 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:32,675 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-06-24 19:34:32,675 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-24 19:34:32,675 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-24 19:34:32,675 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 13 states. [2021-06-24 19:34:32,675 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.